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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Form 10-K
xANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the fiscal year ended December 31, 20172019
OR
¨TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from to
Commission file number: 001-35444
YELP INC.
(Exact name of Registrant as specified in its charter)

Delaware20-1854266
(State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)


140 New Montgomery Street, 9thFloor
San Francisco, California 94105
(Address of principal executive offices) (Zip Code)
Registrant’s telephone number, including area code: (415) 908-3801
Securities registered pursuant to Section 12(b) of the Act:
Title of Each ClassTrading Symbol(s)Name of Each Exchange on Which Registered
Common Stock, par value $0.000001 per shareYELPNew York Stock Exchange LLC
Securities registered pursuant to Section 12(g) of the Act:
None
Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. YES x NO ¨
Yes ☑No ¨
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. YES ¨ NO x
Yes ¨ No ☑
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. YES x NO Yes ☑ No ¨


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Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). YES x NO Yes ☑No ¨
Indicate by check mark if disclosure


Table of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. ¨Contents
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.
Large accelerated filerx
Accelerated filer¨
Non-accelerated filer (Do not check if a smaller reporting company) ¨
Smaller reporting company¨
Emerging growth company¨
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act ¨
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). YES ¨ NO xYes No ☑
The aggregate market value of the voting and non-voting common equity held by non-affiliates of the registrant was approximately $2,335,398,905$1,991,454,326 as of June 30, 2017,2019, the last day of the registrant’s most recently completed second fiscal quarter, based upon the closing sale price of the registrant’s common stock on the New York Stock Exchange LLC reported for June 30, 2017.28, 2019, the last business day of the registrant's most recently completed second fiscal quarter. Excludes an aggregate of 3,958,23013,668,058 shares of the registrant’s common stock held by officers, directors, affiliated stockholders and The Yelp Foundation as of June 30, 2017.2019. For purposes of determining whether a stockholder was an affiliate of the registrant at June 30, 2017,2019, the registrant assumed that a stockholder was an affiliate of the registrant if such stockholder (i) beneficially owned 10% or more of the registrant’s capital stock, as determined based on public filings, and/or (ii) was an executive officer or director, or was affiliated with an executive officer or director, of the registrant at June 30, 2017.2019. Exclusion of such shares should not be construed to indicate that any such person possesses the power, direct or indirect, to direct or cause the direction of the management or policies of the registrant or that such person is controlled by or under common control with the registrant.
As of February 20, 2018,21, 2020, there were 83,474,97371,839,649 shares of the registrant’s common stock, par value $0.000001 per share, issued and outstanding.
DOCUMENTS INCORPORATED BY REFERENCE
Portions of the registrant’s definitive Proxy Statement for the 20182020 Annual Meeting of Stockholders to be filed with the U.S. Securities and Exchange Commission pursuant to Regulation 14A not later than 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K are incorporated by reference in Part III, Items 10-14 of this Annual Report on Form 10-K.





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YELPINC.
YELPINC.
20172019ANNUALREPORT ONFORM10-K
TABLE OFCONTENTS
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PARTI
PARTII
PARTIII
PARTIV
FINANCIALSTATEMENTS

Unless the context suggests otherwise, references in this Annual Report on Form 10-K (the “Annual Report”) to “Yelp,” the “Company,” “we,” “us” and “our” refer to Yelp Inc. and, where appropriate, its subsidiaries.

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Unless the context otherwise indicates, where we refer in this Annual Report to our “mobile application” or “mobile app,” we refer to all of our applications for mobile-enabled devices; references to our “mobile platform” refer to both our mobile app and the versions of our website that are optimized for mobile-based browsers. Similarly, references to our “website” refer to versions of our website dedicated to both desktop- and mobile-based browsers, as well as the U.S. and international versions of our website.

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS
This Annual Report contains forward-looking statements that involve risks, uncertainties and assumptions that, if they never materialize or prove incorrect, could cause our results to differ materially from those expressed or implied by such forward-looking statements. The statements contained in this Annual Report that are not purely historical are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, (the "Securities Act"),or the Securities Act, and Section 21E of the Securities Exchange Act of 1934, as amended, (the "Exchange Act").or the Exchange Act. Forward-looking statements are often identified by the use of words such as, but not limited to, “anticipate,” “believe,” “can,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “might,” “plan,” “project,” “seek,” “should,” “target,” “will,” “would” and similar expressions or variations intended to identify forward-looking statements. These statements are based on the beliefs and assumptions of our management, which are in turn based on information currently available to management. Such forward-looking statements are subject to risks, uncertainties and other important factors that could cause actual results and the timing of certain events to differ materially from future results expressed or implied by such forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to, those discussed in the section entitled “Risk Factors” included under Part I, Item 1A below. Furthermore, such forward-looking statements speak only as of the date of this report. Except as required by law, we undertake no obligation to update any forward-looking statements to reflect events or circumstances after the date of such statements.
NOTE REGARDING METRICS
We review a number of performance metrics to evaluate our business, measure our performance, identify trends in our business, prepare financial projections and make strategic decisions. Please see the section titled “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Key Metrics” for information on how we define our key metrics. Unless otherwise stated, these metrics do not include metrics from Yelp Eat24, Yelp Reservations, Yelp Nowait,Waitlist, Yelp WiFi Marketing, or from our business owner products.products or Yelp Eat24, which we sold on October 10, 2017.
While our metrics are based on what we believe to be reasonable calculations, there are inherent challenges in measuring usage across our large user base. Certain of our performance metrics, including the number of unique devices accessing our mobile app, are tracked with internal company tools, which are not independently verified by any third party and have a number of limitations. For example, our metrics may be affected by mobile applications that automatically contact our servers for regular updates with no discernible user action involved; this activity can cause our system to count the device associated with the app as an app unique device in a given period.
Our metrics that are calculated based on data from third parties — the number of desktop and mobile website unique visitors — are subject to similar limitations. Our third-party providers periodically encounter difficulties in providing accurate data for such metrics as a result of a variety of factors, including human and software errors. In addition, because these traffic metrics are tracked based on unique cookie identifiers, an individual who accesses our website from multiple devices with different cookies may be counted as multiple unique visitors, and multiple individuals who access our website from a shared device with a single cookie may be counted as a single unique visitor. As a result, the calculations of our unique visitors may not accurately reflect the number of people actually visiting our website.
Our measures of traffic and other key metrics may also differ from estimates published by third parties (other than those whose data we use to calculate such metrics) or from similar metrics of our competitors. We are continually seeking to improve our ability to measure these key metrics, and regularly review our processes to assess potential improvements to their accuracy. From time to time, we may discover inaccuracies in our metrics or make adjustments to improve their accuracy, including adjustments that may result in the recalculation of our historical metrics. We believe that any such inaccuracies or adjustments are immaterial unless otherwise stated.

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PART I

Item 1. Business.
Company Overview
Yelp is the leading local business review site in the United States, offering consumers unmatched local business information and businesses a variety of opportunities to connect with purchase-intent driven consumers. OurYelp's mission is to connect consumers with great local businesses. Since our founding in 2004, we have built a trusted local platform that delivers significant value to both consumers and businesses by helping each discover and interact with the other. Our unrivaled content helps consumers save time and money. Our advertising and other products help business owners increase their visibility and connect with our large audience of all sizespurchase-oriented consumers. Yelp's core features and to provide a convenient platform for each stage of their interaction, from discovery and engagement through the completion of a transaction and beyond:functionalities include:

Content.Yelp brings “word of mouth” online through consumer ratings, reviews, tips, photos and videosmore that share their everyday business experiences. As of December 31, 2019, consumers had contributed approximately 205.4 million cumulative reviews of almost every type of local business. These contributions drive a powerful network effect whereby the expanded content draws in more consumers (and more prospective contributors), which improves the value proposition of our products to local businesses.
Discovery. Each day, millions of consumers search for great local businesses using Yelp's website and mobile app, as well as third-party partner services like Apple’s Siri and Amazon’s Alexa personal assistant programs. Business owners, in turn, use our free and paid products to showcase and differentiate their businesses to these intent-driven consumers. For example, business representatives are also able to provide information about their businesses and respond to reviews, among other things, by registering for a free account and “claiming” the business listing page for each of their locations. As ofBy December 31, 2017, consumers had contributed approximately 148.3 million cumulative reviews of almost every type of local business, and2019, business representatives had claimed approximately 4.24.9 million active business listing pages on Yelp. These contributions drive a powerful network effect whereby the expanded content draws in more consumers (and more prospective contributors), which in turn improves the value proposition of our products to local businesses.

Discovery. Each day, millions of consumers take advantage of our wide-ranging content in their search for great local businesses by visiting Yelp's website and mobile app, as well as through third-party services like Apple’s Siri and Amazon’s Alexa personal assistant programs, which access Yelp content to respond to local search queries. Businesses that want to further promote themselves to our large audience of purchase-intent driven consumers can also pay for premium services such as targeted search advertising and furtheradditional enhancements to their business listing pages.

Engagement. Yelp provides multiple channels for consumers and businesses to engage directly with each other. In addition to writing and responding to reviews, consumers and businesses can communicateinteract through messaging features like Request-A-Quote and through our convenient transaction capabilities such as online food ordering. Every month, consumers generate millions of leads for businesses by calling, clicking and submitting Request-A-Quote inquiries through Yelp. Our restaurants category accounts for a significant portion of the engagement on our platform, and Messagefrequently serves as the Business features. We also facilitate consumerstarting point for traffic and engagement with businesses in our restaurants and nightlifeother categories, throughsuch as home & local services. Our investments in Yelp Reservations, our online reservations product, and Yelp Nowait, the waitlist system we acquired in February 2017,Waitlist, which allows consumers to check wait times at restaurants and join waitlists remotely. Our Yelp WiFi Marketing product, which we acquiredremotely, have not only driven substantial engagement in April 2017, allows businesses to connect with their customers by offering them access tothe restaurants category, they have also driven a free in-store wifi network.

Transactions. The Yelp Platform allows consumers to transact with local businesses directly throughgrowing stream of recurring subscription revenue. We have also designed the user experience on our website and mobile app, primarily through integrations with partners ranging from RepairPal (auto repair booking),where we find our most engaged users, to GolfNow (tee time booking), to BloomNation (flower ordering)highlight these and other features in our most highly trafficked category.
Attribution and Analytics. Online food ordering constitutesWe offer businesses a range of tools and features that measure the largest category of transactions by revenue and volume on the Yelp Platform and is currently available through partners including Eat24, which we sold to Grubhub Holdings Inc., a wholly-owned subsidiary of Grubhub Inc. (“Grubhub”), in October 2017. Concurrently with the closingeffectiveness of our sale of Eat24, we entered into a strategic partnership with Grubhub to expand our online ordering capabilities by integrating Grubhub’s restaurant network onto the Yelp Platform.

Retentionproducts and Analytics.provide business insights. In addition to being a point of engagement between consumersthe reporting and businesses,advertising-management features available through our Yelp WiFi Marketingfor Business Owners app, we offer store-level attribution through our Yelp Store Visits product includes anand integrations with third-party data partners. These detailed reporting and analytics platform that provides wifi as a digital marketing toolcapabilities continued to retain and reward customers. The Yelp Cash Back program, which allows consumers receive uphelp us sell our advertising products more successfully to 10% cash back when they shop at participating businesses, provides another tool for businessesmulti-location advertisers in 2019, growing revenue from these customers by 22% in 2019 compared to attract and retain loyal customers.2018. We also offer business ownersprovide businesses with local analytics and insights based on our historical data and other proprietary content through our Yelp Knowledge program, as well as tools to measure the effectiveness of our products, including reporting and advertising-management features, through the Yelp for Business Owners app.
program.

We generate revenue primarily from the sale of advertising on our website and mobile app to businesses and, to a lesser extent, from fees on transactions completed on our platform and subscription fees for our non-advertising products. During the year ended December 31, 2017,2019, we generated net revenue of $846.8 million,$1.0 billion, representing 19%8% growth over 2016,2018, net income of $152.9$40.9 million which includes a pre-tax gain of $164.8 million on the sale of Eat24, and adjusted EBITDA of $156.6$213.5 million. For information on how we define and calculate adjusted EBITDA and a reconciliation of this non-GAAP financial measure to net income (loss), see “Management’s Discussion and Analysis of Financial Condition and Results of Operations Non-GAAP Financial Measures” in this Annual Report.
Our Strategy
Following our transition to a multi-channel, on-demand business model, which we completed in 2018 with our move to non-term advertising contracts, we embarked on an ambitious, multi-year business transformation plan designed to drive and sustain profitable long-term growth. The strategy underlying this plan, which we began executing in 2019, looks to leverage our
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competitive advantages — our brand, our large audience of intent-driven consumers, our content and the network dynamics on our platform — to increase the value we provide to consumers and businesses, while continuing to drive efficiency in our business model. As we continue executing on our plan in 2020, we will look to further advance the strategic initiatives we began in 2019.
Revenue Growth
Winning in Key Categories. We are working to address our customers' operational needs with innovative solutions that build on our strengths in key categories. In restaurants, our most trafficked category, our Yelp Reservations and Yelp Waitlist products delighted both consumers and business owners in 2019 — we more than doubled the number of diners seated via Yelp and increased the combined revenue from these products by a double-digit percentage compared to 2018. We expect to substantially increase the number of diners seated via Yelp again in 2020, and we believe this consumer activity will have the added benefit of supporting strong consumer usage and engagement across other categories. We also plan to increase monetization of these subscription services in 2020 through price optimization and cross selling.
In home & local services, our largest and fastest growing category by revenue, we have driven consumer adoption with innovative product experiences like Request-A-Quote, and plan to continue leveraging products with the goal of increasing our monetization of this category. Revenue attributable to Request-A-Quote increased nearly 60% in 2019 compared to 2018, and we significantly increased paid leads to advertisers in this category in 2019, which drove strong acquisition and retention among service provider customers. In 2020, we will continue to explore ways to increase the number of paid leads to customers in this category and provide customers with greater control over the types of leads they receive.
Expanding Our Product Offerings. In addition to developing new advertising products to help our customers differentiate their businesses, we are adapting how we market and merchandise our products based on a business's unique attributes and needs. Matching advertisers to the right products at the right prices will be a priority for us in 2020 and we plan to provide more products across a range of price points to bridge the gap between our free offerings and our targeted search advertising product. For example, we plan to introduce additional profile products in 2020 to complement the affordably priced products we launched in 2019, including our Business Highlights, Portfolios and Yelp Connect products. The initial success of these products gives us confidence that delivering the right product fit to our customers will drive customer satisfaction and improve advertiser lifetime value in turn.
Providing More Value to Business Customers. We aim to provide advertisers with more value for their money, with the goal of driving monetization by increasing trial conversion, customer satisfaction and, ultimately, retention. We believe our efforts to increase the leads delivered to our paying customers, optimize cost-per-click, or CPC, prices and evolve our product experience to provide greater value to businesses have the potential to substantially increase revenue through retention. For example, we delivered 34% more ad clicks to our advertisers in 2019 than 2018 at an 18% lower average CPC, and saw improved retention among non-term advertisers as a result. We plan to continue making improvements to our advertising auction and our Request-A-Quote lead matching capabilities in 2020. Other initiatives include providing our advertisers with more ways to promote their businesses and more control over their ad campaigns. For example, we plan to introduce new types of ads, such as themed ads, which highlight advertisers that respond quickly to consumers or provide free quotes or consultations, and to continue expanding customization options to allow advertisers to tailor their campaigns. We also plan to further develop our analytics tools to show advertisers how their ads are performing relative to competitors and how to optimize their spend.
Capturing the Multi-location Opportunity. We plan to drive continued momentum in our multi-location advertising business by expanding upon our successful go-to-market strategy and offering more solutions to meet the needs of large advertisers. In 2019, we expanded our multi-location sales force by more than 25% as we looked to grow our business with the top 250 restaurants and retailers by revenue, one-third of which were paying customers by the end of the year. We plan to further expand our multi-location sales force in 2020 to extend coverage to multi-location businesses in the services category. On the product side, we are continuing to create compelling new ad formats tailored to the needs of multi-location businesses, including more ways for multi-location advertisers to drive consumer purchases during their key selling seasons. We believe these initiatives will position us to capture a larger share of the multi-location opportunity.
Enhancing the Consumer Experience. Consumers drive the network dynamics on which our value proposition is based: increasing consumer traffic and content contribution further benefits consumers and underpins our ability to create value for businesses through our products and services. To maintain strong growth in our app usage and deepen user engagement, we remain focused on delivering unique product experiences that delight consumers. One of the ways we
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did that in 2019 was by creating an even more personalized Yelp experience for our users, and we plan to expand the personalized recommendations we offer in 2020. We are also creating new features that draw on Yelp’s unique content and comprehensive local data, as well as partnerships, to deliver only-on-Yelp product experiences. For example, in 2019 we introduced new features for Yelp Waitlist, including Predictive Wait Times and Notify Me, that contributed to a doubling of diners seated via Yelp in 2019 compared to 2018. We believe experiences like booking sought-after seats at Yelp-exclusive restaurants, skipping the line at popular eateries and saving time and money on projects arranged via Request-A-Quote will help maintain strong growth in app usage and deepen consumer engagement, thereby increasing our value proposition to businesses. To that end, we plan to launch an updated user interface for our mobile app in 2020 that we believe will better engage consumers, be easier to use and offer added convenience.
Improved Profitability
Focusing on Our Most Efficient Sales Channels. In 2019, we shifted our emphasis to the most efficient and high-margin sales channels, our multi-location and self-serve channels. The success of this initiative — revenue from the multi-location and self-serve channels increased by 22% and 30% compared to 2018, respectively — improved the economics of our business, allowing us to reduce our local sales force by 10% in 2019 without sacrificing revenue growth. We plan to continue our efforts to expand our multi-location business in 2020. We also plan to continue expanding the products and customization options available through our self-serve channel in 2020, which allows businesses to purchase ads directly through our website and generates high-margin revenue without heavy involvement from our sales force.
Improve Retention by Delivering More Value. We believe there is substantial opportunity to drive profitable growth by improving customer and revenue retention. In 2019, we accomplished this by delivering greater value to advertisers, which improved their satisfaction with our products and led to increased spending over time. For example, in 2019, we improved non-term advertising revenue retention by a mid-teens percentage as we delivered more leads at lower CPCs. In 2020, we plan to continue these efforts as well as further enhance the quality and targeting of our ads.
Optimizing Cost Structure and Controlling Expenses. Our ability to improve our margins will depend on our ability to effectively control and, where possible, reduce our expenses. In 2019, we reduced the size of our local sales force by 10%, significantly reduced the size of our San Francisco sales office and relocated a number of G&A positions from San Francisco to our Phoenix office, reducing some of the ongoing operating expenses associated with those teams. We do not plan to grow our local sales headcount in 2020, consistent with our focus on our most efficient sales channels. We also plan to expand the product and engineering teams in our Toronto office to further take advantage of lower-cost markets.
We intend to continue evaluating opportunities to control or reduce other corporate expenses throughout 2020. In 2019, we reduced our marketing spend on consumer traffic, instead relying more heavily on in-app and cross-product marketing as well as on the organic traffic growth driven by our community development efforts. In 2020, we plan to continue capitalizing on the product and marketing investments we made in prior years — particularly the investments we made in Yelp Reservations and Yelp Waitlist to drive consumer engagement — to control our marketing spend.
Our Products and Services

Advertising
We provide a range of free and paid advertising products to businesses of all sizes, including the ability to deliver targeted search advertising to large local audiences through our website and mobile app. As in past years, advertising accounted for the vast majority of our revenue during the year ended December 31, 2017,2019, accounting for 91%96% of our revenue, aswhich was flat compared to the year ended December 31, 2018 and up from approximately 90%91% for the year ended December 31, 2016 and approximately 86% for the year ended December 31, 2015.2017. We recognize revenue from our business listing and advertising products, including advertising sold by partners, as advertising revenue.
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Free Online Business Account
We enable businesses to create a free online business account and claim the listing page for each of their business locations. With their free business accounts, businesses can view trends (e.g. statistics and charts of the performance of their pages on our platform), use the Revenue Estimator tool (e.g. to quantify the revenue opportunity Yelp provides),provides, message customers (e.g. by replying to messages or reviews either publicly or directly), update listing information (e.g. address, hours of operation) and offer Yelp Deals and Gift Certificates (as described below).

Certificates.
Branded Profile
Our Branded Profile product provides businesses with access to premium features in connection with their business listing pages, such as the ability to update listing information and select photos or videos to highlight on the page through a slideshow feature. Businesses can also promote a desired transaction of their choosing — such as scheduling an appointment or printing a coupon — directly on their business listing pages with our Call to Action feature. This feature transfers consumers from a business’s listing page to the business’s own website to complete the action. Account support is available via phone and email for businesses that purchase a Branded Profile program.



Enhanced Profile
In addition to providing businesses with the same premium features and support options as our Branded Profile product, our Enhanced Profile product restricts how ads from other businesses appear on the business listing pages of our Enhanced Profile customers.
Yelp Verified LicenseYelp Verified License is a badge that appears on business listing pages as a paid upgrade for certain licensed advertisers, primarily in our home & local services category. The badge indicates that we have verified the business's trade license and confirmed it was in good standing as of a certain date, allowing businesses to distinguish themselves as licensed and helping consumers make safe and confident decisions when selecting businesses for their projects.
Business HighlightsBusinesses in eligible categories can pay to highlight up to six attributes that make their business unique — e.g. "Family Owned" or "Pet Friendly." These highlights appear on business listing pages in a section called "Highlights from the Business," and the top two highlights also appear in organic and sponsored search results for that business.
Yelp PortfolioOur Yelp Portfolio product allows businesses to showcase their specialties to prospective customers through a photo collection of projects. A business's Portfolio is displayed on its business listing page and can include additional details such as costs, timelines and services provided, allowing potential customers to learn more about the business and helping them decide if the business is the best fit for their upcoming project. Yelp Portfolio is currently available for businesses in certain home & local services categories.
Yelp ConnectYelp Connect gives businesses an opportunity to tell users more about what makes their business special through posts appearing on their business listing pages.



pages by highlighting the unique features of the business, upcoming events, limited time offers and other timely content. Yelp automatically promotes Yelp Connect posts to a business's followers.
Search and Other Ads
We allow businesses to promote themselves as a sponsored search result on our platform, on the listing pages of related businesses and as suggested “additional businesses” for consumers using our Request-A-Quote feature. We now sell ads primarily on a per-clickCPC basis, though we also offer impression-based ads.

Ad ResalesWe also generate revenue through the resale of our advertising products by certain agencies and partners, such as DexYP,Thryv (formerly DexYP), as well as monetization of remnant advertising inventory through third-party ad networks. In 2018, we launched the Yelp Ads Certified Partners Program, which allows partner agencies to independently sell and manage ad campaigns on behalf of their small and medium-sized business clients, providing increased centralization and flexibility.
Transactions
In addition to our advertising products, we also offer several features and consumer-interactive tools to facilitate transactions between consumers and the local businesses they find on Yelp. We recognize revenue from these sources on a net basis as transactions revenue.

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Eat24 and the Grubhub PartnershipPrior to our sale of Eat24 to Grubhub on October 10, 2017, we generated revenue from our Yelp Eat24 business through arrangements with restaurants in which restaurants paid a commission percentage fee on orders placed through Yelp Eat24. Following the sale, Eat24’s restaurant network remains integrated on our platform and, pursuant to our strategic partnership, Grubhub’s restaurant network was integrated onto our platform mid-2018. This partnership has provided consumers with a wider selection of restaurants and better delivery options, while improving our per-order profitability.
Yelp Platform
The Yelp Platform allows consumers to transact with businesses directly on our website or mobile app through partner integrations. Consumers can order flowers, purchase event tickets, and book spa and salon appointments, among many other transaction opportunities, all without leaving Yelp.

Eat24 and the Grubhub Partnership
Prior to our sale of Eat24 to Grubhub on October 10, 2017, we generated revenue from our Yelp Eat24 business through arrangements with restaurants in which restaurants paid a commission percentage fee on orders placed through the Yelp Eat24 platform. Following the sale, Eat24’s restaurant network remains integrated on the Yelp Platform and, pursuant to our strategic partnership, we are currently integrating Grubhub’s restaurant network, which we expect to be complete by mid-2018. When implemented, we expect this partnership to provide consumers with a wider selection of restaurants and better delivery options, while improving our per-order profitability.

Yelp DealsOur Yelp Deals product allows local business owners to create promotional discounted deals for their products and services, which are marketed to consumers through our platform. We typically earn a fee based on the discounted price of each deal sold. We process all customer payments and remit to the business the revenue share of any Yelp Deal purchased.
Gift Certificates
Our Gift Certificates product allows local business owners to sell full-price gift certificates directly to consumers through their business listing pages. The business chooses the price point to offer (from $10 to $500), and consumers may purchase Gift Certificates denominated in such amounts. We earn a fee based on the amount of the Gift Certificate sold. We process all consumer payments and remit to the business the revenue share of any Gift Certificate purchased.

Other Services
We generate other revenue through subscription services, licensing payments for access to Yelp data and other non-advertising, non-transaction arrangements, such as certain partnerships.arrangements. We recognize revenue from these sources as other services revenue.
Yelp Reservations
We provide restaurants, nightlife and certain other venues with the ability to offer online reservations directly from their Yelp business listing pages through our Yelp Reservations product, which also includes front-of-house management tools. We offer this product as a monthly subscription service.
As of December 31, 2017, approximately 4,500 restaurants nationwide were bookable through Yelp Reservations.
Yelp NowaitWaitlist
Yelp NowaitWaitlist is a subscription-based waitlist management solution that allows consumers to check wait times and join waitlists remotely and businesses to efficiently manage seating and server rotation. As with Yelp Reservations, Yelp NowaitWaitlist is available directly on business listing pages.

pages as well as in-store kiosks.
Yelp WiFi Marketing
Our Yelp WiFi Marketing product provides businesses with the ability to create easy on-premises wifi access for customers, advertise products on the wifi log-in page, and collect contact and social media information from customers who access wifi for use in marketing campaigns. We offer this product as a monthly subscription service.

Yelp Knowledge
Through partnerships with companies such as Sprinklr, InMoment and Chatmeter, our Yelp Knowledge program offers business owners local analytics and insights through access to our historical data and other proprietary content. Our Yelp Knowledge partners pay us program fees for access to Yelp Knowledge content.

Other Partnerships
Other non-advertising partner arrangements include content licensing and allowing third-party data providers to update and manage business listing information on behalf of businesses.

Brand Advertising
Through the end of 2015, we also offered advertising solutions for national brands in the form of display advertisements and brand sponsorships. We phased out these products over the second half of 2015 and redeployed the associated internal resources elsewhere within our organization. We recognized revenue from these products as brand revenue through the end of 2015.
Revenue by Product
The following table provides a breakdown of our revenue by product for the years indicated (in thousands):

Year Ended December 31,
201920182017
Net revenue by product:
Advertising$976,925  $907,487  $775,678  
Transactions12,436  13,694  60,251  
Other services24,833  21,592  14,918  
Total net revenue$1,014,194  $942,773  $850,847  

Sales
We sell our products directly through our sales force, indirectly through partners and online through our website. Our sales force consisted of 3,844 employees as of December 31, 2019 and is located across our offices in San Francisco, California, Scottsdale, Arizona, New York, New York, Chicago, Illinois, Washington, D.C., and Toronto, Ontario, as well as across a remote workforce to an increasing extent.
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 Year Ended December 31,
 2017 2016 2015
Net revenue by product:     
Advertising$771,644
 $645,241
 $471,416
Transactions60,251
 62,495
 43,854
Other services14,918
 5,333
 3,429
Brand advertising
 
 31,012
Total net revenue$846,813
 $713,069
 $549,711
Direct Sales. A large majority of our sales force — 3,600 employees as of December 31, 2019 — is dedicated to selling our advertising products, with a significantly smaller component responsible for selling our subscription products. Our sales force primarily sells CPC advertising; only a small percentage of ads continue to be impression-based. Sales representatives are primarily responsible for generating qualified sales leads by identifying and contacting businesses through direct engagement, direct marketing campaigns and weekly e-mails to claimed local businesses. Although our direct sales force is primarily focused on increasing revenue by adding new customers, sales representatives on our client partner team engage with existing customers with the goal of increasing their overall spend. Sales representatives are typically compensated on the basis of advertising sold in a given period.
Sales Partnerships. Since 2014, we have allowed partners, such as Thryv, to sell certain of our advertising products as part of a package with their own advertising products to their advertiser bases. The products covered by these arrangements include our Enhanced Profile and CPC advertising. In 2018, we launched the Yelp Ads Certified Partner Program with the aim of making it more efficient for agencies to manage ad campaigns on behalf of their small and medium-sized business clients. By allowing partner agencies to independently sell and manage ad campaigns rather than working through Yelp to do so, this program has improved the process and increased flexibility. We continue to explore additional partnerships for the sale or bundling of our products, as well as with select marketing agencies.
Self-Serve Ads. Our online, or self-serve, sales channel allows businesses to purchase advertising solutions directly from our website. Businesses can purchase sponsored CPC search advertising, Yelp Connect and business listing page upgrades such as Business Highlights and Yelp Portfolios directly through this channel. The convenience of our self-serve sales channel has helped us expand our customer base, and we are continuing to test approaches to this sales channel, including by offering advertisers more options to customize their ads.
Customer Success. While the focus of our sales force was historically on adding new customers, we also see opportunity to deepen our relationships with existing customers. To this end, our customer success team supports existing business advertisers through account management, cross-selling and retention initiatives. We plan to continue developing our customer success team and streamlining our customer success processes to bolster our ability to respond to changes in revenue retention that may emerge from our non-term advertising customers in particular, who have the ability to cancel their advertising at any time.
Consumer Engagement
At the heart of our business are the vibrant communities of contributors that contribute the content on our platform. These contributors provide rich, firsthand information about local businesses in the form of reviews, and ratings, tips, photos and videos. Each review, rating, tip, photo and video expands the breadth and depth of the content on our platform, which drives a powerful network effect: the expanded content draws in more consumers and more prospective contributors. Although measures of our content (including our cumulative review metric) and traffic (including our desktop and mobile unique visitors and app unique device metrics) do not factor directly into the advertising arrangements we have with our advertising customers, this network effect underpins our ability to deliver clicks and ad impressions to advertisers. Increases in these metrics improve our value proposition to local businesses as they seek easy-to-use and effective advertising solutions.
Community Management
For the above reasons, we foster and support communities of contributors and make the consumer experience our highesta top priority. We have a team of Community Managers and Community Ambassadors based across the United States and Canada whose primary goals are to support and grow their local communities of contributors, raise brand awareness and engage with their surrounding communities through:

planning and executing fun and engaging events for the community, such as parties, outings and activities at restaurants, museums, hotels and other local places of interest;

getting to know community members and helping them get to know one another to foster an offline community experience that can be transferred online;

promoting Yelp, including guest appearances on local television and radio, and at local events such as concerts and street fairs; and

writing weekly e-mail newsletters to share information with the community about local businesses, events and activities.

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Through these activities, we believe our community management team helps us increase awareness of our platform and grow avid communities who are willing to contribute content to our platform. These active contributors may be invited to attend sponsored social events, but do not receive compensation for their contributions. This community growth drives the network effect whereby contributed reviews expand the breadth and depth of our content base. This expansion draws an increasing number of consumers to access the content on our platform, thus inspiring new and existing contributors to create additional reviews that can be shared with this growing audience.
In general, the communities we entered into earlier are more populous than those we entered into later, and we have already entered manymost of the largest cities in the United States and Canada. For these and other reasons, launching additional communities may not yield results similar to those of our existing communities. As a result, we continue to believe that development of our existing communities currently provides the greatest opportunity for growth, and plan to continue to focus our community development efforts on existing communities in 2018.2020.
Reviews
As of December 31, 2017,2019, our communities had contributed approximately 148.3205.4 million cumulative reviews of almost every type of local business. Of the approximately 148.3 millionthese cumulative reviews, our contributors had submitted through December 31, 2017, approximately 106.1145.5 million were recommended and available on business listing pages; approximately 31.744.4 million were not recommended and available on secondary pages; and approximately 10.615.5 million had been removed from our platform.

Although they do not factor into a business’s overall star rating, we provide access to reviews that are not recommended because they provide additional perspectives and information on reviewed businesses, as well as transparency of the efficacy of our automated recommendation software.
The reviews contributed to our platform cover a wide set of local business categories, including restaurants, shopping, beauty and fitness, arts, entertainment and events, home and local services, health, nightlife, travelbeauty and hotel, autofitness, health and other categories. In the chartschart below, we highlight the breakdownpercentage of businesses in a given category that had received a review, the percentage of total reviews by category as of local businessesDecember 31, 2019 and the percentage of our advertising revenue associated with each category. The categories associated with these reviews reflect Yelp's category definitions as of December 31, 2019.
yelp-20191231_g1.jpg
(1) Businesses that havehad received reviews that were available on our platform — i.e., including reviews that were recommended and the breakdown by category of the cumulativenot recommended, but not including reviews contributed tothat had been removed from our platform through— as of December 31, 2017.2019, including some businesses that had received only reviews that were not recommended.
(2) Cumulative reviews as of December 31, 2019, including reviews that had been removed from our platform.

(1)The above chart provides a breakdown of the categories of businesses that had received reviews that were available on our platform — i.e., including reviews that were recommended or not recommended, but not including reviews that had been removed from our platform — as of December 31, 2017, including some businesses that had received only reviews that were not recommended. The categories reflect Yelp's category definitions as of December 31, 2017.

(3) Our top five categories accounted for an aggregate of 79% of our advertising revenue (excluding advertising sold by partners) for the year ended December 31, 2019.
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(2)The above chart provides a breakdown of our cumulative reviews as of December 31, 2017, including reviews that had been removed from our platform. The categories of the businesses associated with these reviews reflect Yelp's category definitions as of December 31, 2017.
We believe that the concentration of reviews in the restaurant and shopping categories in particular is primarily due to the frequency with which individuals visit specific businesses or engage in certain activities versus others. For example, an individual may eat at a restaurant three times in one week or go shopping once a week, but the same individual is unlikely to visit a mechanic, get a haircut or use a home or local service with the same frequency. The top five industry categories accounted for an aggregate of 77% of our advertising revenue (excluding advertising sold by partners) for the quarter ended December 31, 2017, broken down as follows: Home & Local Services, 31%; Restaurants, 14%; Beauty & Fitness, 12%; Health, 11%; and Shopping, 9%.
Our Strategy
Our strategy looks to leverage our competitive advantages — our brand, our content and the network dynamics in Yelp communities — to increase the value we provide to consumers and businesses, while continuing to drive efficiency in our business model:
Consumers
Consumers drive the network dynamics on which our value proposition is based: growing consumer traffic and content contribution further benefits consumers and underpins our ability to create value for businesses through our products and services. For this reason, we believe that our approach of making the consumer experience our highest priority has been essential to our success in attracting users with low acquisition costs, and remain committed to this approach by:

Fostering Yelp Communities. While organic growth driven by our community development efforts, as described above, continues to be the primary driver of our traffic, we will continue investing in marketing in 2018 to leverage our brand and help fuel the network dynamics on our platform. As in 2017, we expect to focus our advertising budget on performance advertising with the goal of increasing consumer usage of our mobile app, among others. We will also look to provide additional, and refine existing, in-app messaging opportunities and social features to better facilitate sharing content on our platform.


Maintaining and Enhancing Our High-Quality Content. Consumer trust in our content is essential to our business, and we will continue our consumer protection efforts to maintain and enhance the quality of our content. In 2017, for example, we increased our efforts to discourage business owners from soliciting reviews to help ensure that consumers have access to unbiased content on our platform. We also expanded the public health information available on our platform by partnering with the California Health Care Foundation and Cal Hospital Compare to display maternity care measures for the approximately 250 hospitals that deliver babies in California, and made information on businesses with gender neutral bathrooms available.

Designing Features with Consumers in Mind. By continuing to develop a feature-rich platform for consumers and leveraging consumer trends in use of our platform, we believe we can increase the number of visits and searches per user. For example, in 2017, we expanded our product offerings in food and restaurants, the categories on our platform that receive the most traffic, through our acquisition of a remote waitlist system in Yelp Nowait and our strategic partnership with Grubhub, which, when fully implemented, we expect to increase the number of order-enabled restaurants available to consumers on the Yelp Platform from approximately 42,000 to approximately 80,000. We also plan to continue to invest in developing our mobile platform, and our mobile app in particular, to take advantage of the growing number of consumers accessing Yelp through their mobile devices. For example, we redesigned our mobile business listing pages in 2017 to better showcase photos, which consumers are increasingly viewing.

Businesses

Our business depends on our ability to maintain and expand our customer base. To do so, we must convince existing and prospective customers alike that our products offer a material benefit to their businesses by:

Expanding Our Portfolio of Products. We believe that offering business owners compelling products and comprehensive tools to engage with customers will encourage businesses to use our services. We plan to continue to grow and develop products and partner arrangements that provide incremental value to our advertisers and business partners to encourage them to increase their budgets allocated to our platform and otherwise integrate their product offerings with Yelp. For example, as a result of our 2017 acquisition of Turnstyle Analytics Inc. ("Turnstyle"), we now offer businesses location-based marketing and analytics to help them attract, retain and reward customers. We also introduced our Yelp Cash Back program in 2017 to provide businesses with another tool to attract and retain loyal customers.

Enhancing Our Existing Product Offerings. We are also working to continue expanding and improving our existing product offerings to increase their value to our business customers. In 2017, for example, we began offering our advertisers the ability to start and stop their campaigns at any time, began offering advertisers more options to customize their ads, expanded the availability of our Request-A-Quote feature and upgraded our Yelp Reservations product with improvements to the floor view for restaurant management. In addition, we partnered with companies like Inmoment and Yext, among others, to expand our Yelp Knowledge program and offer businesses local analytics and insights based on historical Yelp data.

Enabling Connections. As we explore opportunities to monetize our products, we must balance customer demands against our commitment to providing a good user experience; we will not incorporate products or features that we believe may excessively degrade the consumer experience and potentially alienate users, even if they might result in increased short-term monetization. We believe that investing in products that facilitate connections between businesses and consumers — as distinct from advertising products, which are more likely to be disruptive to consumers — provides a significant opportunity to balance these competing considerations successfully. For example, we believe the continued expansion of our transaction, messaging and customer retention offerings will not only drive further consumer engagement, but also attract additional business customers. To that end, in 2017, we expanded Request-A-Quote, resulting in the volume of requests more than doubling in 2017 compared to 2016, acquired and began scaling our Yelp WiFi Marketing and Yelp Nowait products and launched our Yelp Cash Back program. By the end of 2017, nearly 14,000 businesses were connected to Yelp Reservations, Yelp Nowait or Yelp WiFi Marketing, and we plan to increase our investment in these products in 2018 to strengthen our competitive position in the Restaurants category. While we expect that our advertising products will continue to drive the vast majority of our revenue for the foreseeable future, we believe tools like these will be increasingly important over the long term.

Communicating Our Value. Our ability to compete effectively for our customers’ budgets depends on their perceptions regarding our platform and products, particularly regarding their ability to generate a competitive return relative to other alternatives. For example, we plan to continue to develop and refine comprehensive business owner tools to measure the effectiveness of our products, including the advertising-management features for our Yelp for Business Owners app. We will also continue our local business outreach efforts, including educating local businesses on how Yelp provides value to them. In addition, we expect that the transactions and other types of connections we are investing in, as described above, will also allow business owners to attribute customer leads to Yelp more clearly than ad clicks.

Operating Efficiencies
Our success depends on our ability to maintain adequate revenue growth while effectively managing our expenses through strategies including:
Improving Sales Performance.Our core strength is our advertising business, which has a significant and growing base of revenue. In addition to increasing sales headcount in this business, we also plan to continue pursuing initiatives to increase sales force performance. For example, our sales force recently began selling the flexible-term contracts already available to our self-serve customers, which we believe will result in a more efficient sales process and improved productivity. In 2017, we began utilizing machine learning to help sales team members choose the most promising customer leads to contact. We also adjusted the standard compensation package offered to incoming sales representatives to help address employee turnover and increase the average tenure of sales representatives. Because more tenured sales representatives are generally more successful than less tenured representatives, we believe this and other retention efforts help improve overall sales performance.

Broadening Our Sales Strategy.While we will continue to invest in sales resources, we are also pursuing a broader sales strategy to address the revenue opportunity from existing customers and new advertisers. For example, in 2017, we continued to expand our customer success team (previously referred to as our account management team), which led to improved revenue retention rates in 2017 compared to 2016. We also plan to continue investing in evolving sales channels, such as our self-serve advertising channel and partnerships with select marketing agencies and resellers that provide large and medium-sized advertisers with greater access to our products. The convenience and flexible contract term lengths of our self-serve channel helped increase revenue from this channel by nearly 50% in the fourth quarter of 2017 compared to the same period in 2016. We plan to build on these developments in 2018 by extending the flexibility of our self-serve ad campaigns to our full-service advertising customers.

Maintaining a Rational Approach to Product, Business and Corporate Development. Our success will depend, in part, on our ability to expand our product offerings and grow our business in response to changing technologies, consumer and advertiser demands, and competitive pressures. We may accomplish this through internal development efforts, entering into partnerships with third parties, or the acquisition of complementary businesses or technologies, and choosing the most efficient method will be critical to managing our expenses effectively. In 2017, for example, we disposed of our Yelp Eat24 food ordering business and entered into a long-term, strategic partnership with Grubhub in its place, which we believe will improve our per-order profitability in addition to providing significantly more options to consumers when fully implemented. By contrast, we elected to acquire Nowait, Inc. ("Nowait") instead of continuing our partnership arrangement with it based on our determination that the expected benefits of fully integrating and scaling its waitlist system outweighed the more limited benefits available through the partnership arrangement.

Investing in High-Monetization Categories. Although our Restaurants category receives more traffic than any other category, our most highly monetized and fastest growing revenue categories are Home & Local Services, Automotive and Health, where businesses tend to engage in higher margin and higher dollar value transactions. We plan to continue investing in products and features that help draw users of our highly trafficked categories to our highly monetized categories, such as our Request-A-Quote feature, which consumers were using to generate more than one million requests each month as of December 31, 2017. While Request-A-Quote is currently generating revenue as inventory for our existing advertising products, we are also exploring new ways to monetize this feature that better reflect the value of these high-converting leads.


Sales

We sell our products directly through our sales force, indirectly through partners and online through our website. Our sales force consisted of 3,400 employees as of December 31, 2017 and is located across our offices in San Francisco, California; Scottsdale, Arizona; New York, New York; Chicago, Illinois; Washington, D.C.; and Toronto, Ontario. From 2012 to 2016, we also had sales operations in Europe, including in Dublin, Ireland and Hamburg, Germany. In the fourth quarter of 2016, however, we wound down our sales activities in markets outside the United States and Canada, where we believe the long-term return on continued investment to be lower than opportunities for Yelp within our core markets.

Direct Sales. A large majority of our sales force — 3,300 employees as of December 31, 2017 — is dedicated to selling our advertising products, with a significantly smaller component responsible for selling Yelp WiFi Marketing, Yelp Reservations and Yelp Nowait products. Our sales force primarily sells cost-per-click advertising; only a small percentage of ads continue to be impression-based. Sales representatives are primarily responsible for generating qualified sales leads by identifying and contacting businesses through direct engagement, direct marketing campaigns and weekly e-mails to claimed local businesses. Our direct sales force is focused on increasing revenue by adding new customers, and sales representatives are typically compensated on the basis of advertising sold in a given period.
Sales Partnerships. Since 2014, we have allowed our partners, such as DexYP, to sell certain of our advertising products as part of a package with their own advertising products to their advertiser bases. The products covered by these arrangements include our enhanced profile and cost-per-click advertising. We continue to explore additional partnerships for the sale or bundling of our products, as well as with select marketing agencies.
Self-Serve Ads. Our online, or self-serve, sales channel allows businesses to purchase advertising solutions directly from our website. Businesses can purchase performance-based cost-per-click sponsored search advertising directly through this channel. The convenience and flexible terms of our self-serve sales channel helped us attract thousands of new advertisers in 2017, and we are continuing to test approaches to this sales channel, including by offering advertisers more options to customize their ads.
Customer Success. While the focus of our sales force has historically been on adding new customers, we also see opportunity to deepen our relationships with existing customers. To this end, our customer success team supports existing business advertisers through account management, cross-selling and retention initiatives. In 2017, we grew our customer success team and focused on streamlining our customer success processes, which we believe will give us a greater ability to respond to changes in revenue retention that may emerge from the increasing portion of our customers who are able to cancel their advertising commitments at any time.
Technology
Product development and innovation are core pillars of our strategy. We devote a substantial portion of our resources to researching and developing new solutions and enhancing existing solutions, conducting product testing and quality assurance testing, improving core technology and strengthening our technological expertise. In addition, we acquired talent and technology through our acquisitions of Nowait, Inc. and Turnstyle Analytics Inc. in 2017. For the years ended December 31, 2017, 20162019, 2018 and 2015,2017, product development expenses totaled $175.8$230.4 million, $138.5$212.3 million and $107.8$175.8 million, respectively.
We aim to delight our users and business partners with our products. We provide our web-based and mobile services using a combination of in-house and third-party technology solutions and products:
Search and Ranking Technology. We leverage the data stored on our platform and our proprietary indexing and ranking techniques to provide our users with contextual, relevant and up-to-date results to their search queries. For example, a consumer desiring environmentally friendlyenvironmentally-friendly carpet cleaners does not have to call individual cleaners to inquire about their use of chemical-based cleaning solutions. Instead, the consumer can search for “environmentally-friendly carpet cleaners” on Yelp and discover cleaners with the best service and “green” cleaning products that serve a specific neighborhood.

Recommendation Software. We employ our proprietary automated recommendation software to analyze and screen all reviews submitted to our platform. We believe our recommendation technology is one of the key contributors to the quality and integrity of the reviews on our platform and the success of our service. See “—Consumer Protection Efforts” below for additional details regarding our recommendation software.


Mobile Solutions. We have seen substantial growth inThe number of consumers accessingwho access information about local businesses through mobile devices increased substantially in recent years, and we anticipate that growth in use of our mobile platform will be the driver of our growth for the foreseeable future. Our most engaged users are on our mobile app, making it particularly critical to our continued success. Forsuccess; for example, in the quarter ended December 31, 2017,2019, mobile devices accounted for approximately 79% of all searches and approximately 70%75% of all ad clicks on our platform, compared to 73% and approximately 66%, respectively, in the quarter ended December 31, 2016.

To take advantage of this trend,platform. As a result, we have invested significant resources into the development of our comprehensive mobile platform for consumers supporting the major smartphone operating systems available today, iOS and Android. Over time, we have enhanced the functionality of our mobile platform, such that it provides similar and, in some areas, greater functionality than our website. Some of the innovations we introduced through our mobile platform include “check-ins,” “tips,” “comments,” “Nearby” and “Monocle,” our augmented reality feature. We also offer a mobile app for business owners, designed to make it easier for them to engage with their customers and manage their Yelp profiles. The Yelp for Business Owners app is currently available for iOS and Android.
Advertising Technologies. We use proprietary ad targeting and delivery technologies designed to provide relevant local advertisements to consumers viewing our content. Our proprietary ad delivery system leverages our unique repository of data to provide useful ads to users and high value leads to advertisers.

Infrastructure. Our web and mobile platforms are currently hosted from multiple locations, primarilyalmost entirely through Amazon Web Services. We also host parts of our infrastructure within shared data environments in California and Virginia, as well as with third-party leased server providers. Our web and mobile platforms are designed to have high availability, from the Internet connectivity providers we choose, to the servers, databases and networking hardware that we deploy. We design our systems such that the failure of any individual component is not expected to affect the overall availability of our platform. We also leverage other third-party Internet-based (cloud) services such as rich-content storage, map-related services, ad serving and bulk processing.

Network Security. Computer viruses, malware, phishing attacks, denial-of-service and other attacks and similar disruptions from unauthorized use of computer systems have become more prevalent in our industry, have occurred on our systems in the past and we expect them to occur periodically on our systems in the future. For this reason, our platform includes a host of encryption, antivirus, firewall and patch-management technologies designed to help protect and maintain the systems located at data centers as well as other systems and computers across our business.
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Consumer Protection Efforts

Our success depends on our ability to maintain consumer trust in our solutions and in the quality and integrity of the user content and other information found on our platform. We dedicate significant resources to the goal of maintaining and enhancing the quality, authenticity and integrity of the reviews on our platform, primarily through the following methods:

Automated Recommendation Software. We use proprietary software to analyze the relevance, reliability and utility of each review submitted to our platform. The software applies the same objective standards to each review based on a wide range of data associated with the review and reviewer, regardless of whether the business being reviewed advertises on Yelp. These objective standards include various measures of relevance, reliability and utility, such as the reviewer’s type and level of activity with Yelp (which might correspond to the reviewer’s reliability or suggest reviewer biases) and whether certain reviews originate from related Internet Protocol addresses (which might mean the reviews were submitted by the same person). The results of this analysis can change over time as the software factors in new information, which may result in reviews that were previously recommended becoming not recommended, and reviews that were previously not recommended being restored to recommended status. Reviews that the software deems to be the most useful and reliable are published directly on business listing pages, though neither we nor the software purport to establish whether or not any individual review is authentic. As of December 31, 2017,2019, our software was recommendingrecommended approximately 72%71% of the reviews submitted to our platform. Reviews that are not recommended are published on secondary pages and do not factor into a business’s overall star rating. As of December 31, 2017,2019, approximately 21%22% of the reviews submitted to our platform were not recommended but still accessible on our platform.
Education. We provide businesses with information and materials regarding our stance against review solicitation and work with businesses to ensure that any they are aware that Yelp does not work with third-party review solicitation companies that offer to artificially inflate search rankings and online reputations. By working to educate businesses about why review solicitation harms consumers and can undermine a business’ reputation, we believe we can reduce the frequency with which businesses engage in such activities.

Sting Operations. We routinely conduct sting operations to identify businesses and individuals who offer or receive cash, discounts or other benefits in exchange for reviews. For example, we may respond to advertisements offering to pay for reviews that are posted on Craigslist, Facebook and other platforms. We also receive and investigate tips from our users about potential paid reviews. If we identify or confirm any such issues through our investigations, we typically pursue one or more of the courses of action described below (each of which we may also employ on a stand-alone basis).
Consumer Alerts Program. We issue consumer alert warnings on business listing pages from time to time when we encounter suspicious activity that we believe is indicative of attempts to deceive or mislead consumers. For example, we may issue a consumer alert if we encounter a business attempting to purchase favorable reviews, or if a large number of favorable reviews are submitted from the same Internet Protocol address. Consumer alerts generally remain in effect for 90 days, or longer if the deceptive practices continue.
Coordination with Law Enforcement. We regularly cooperate with law enforcement and consumer protection agencies to investigate and identify businesses and individuals who may be engaged in false advertising or deceptive business practices relating to reviews. For example, in 2013, we assisted the New York Attorney General with “Operation Clean Turf,” an undercover investigation targeting review manipulation that resulted in 19 companies agreeing to pay more than $350,000 in fines to the State of New York. In 2016, in a continuation of this investigation, the New York Attorney General announced settlements with six additional businesses that tried to mislead consumers, resulting in the businesses agreeing to pay fines and to take measures to increase the honesty and transparency of their online reviews.
Legal Action. Our terms of service prohibit the buying and selling of reviews, as well as writing fake reviews. In egregious cases, we take legal action against businesses we believe to be engaged in deceptive practices based on these prohibitions.
Removal of Reviews. We regularly remove reviews from our platform that we believe violate our terms of service, including, without limitation: fake or defamatory reviews; content that has been bought, sold or traded; threatening, harassing or lewd content, as well as hate speech and other displays of bigotry; and content that violates the rights of any third party or any applicable law. Consumers can access information about reviews that we have removed for a particular business by clicking on a link on the business’s listing page. As of December 31, 2017,2019, approximately 7% of the reviews submitted to our platform had been removed.
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Intellectual Property
We rely on federal, state, common law and international rights, as well as contractual restrictions, to protect our intellectual property. We control access to our proprietary technology and algorithms by entering into confidentiality and inventions assignment agreements with our employees and contractors, as well as confidentiality agreements with third parties.
In addition to these contractual arrangements, we also rely on a combination of patent, trade secrets, copyrights, trademarks, service marks and domain names to protect our intellectual property. We pursue the registration of our copyrights, trademarks, service marks and domain names in the United States and in certain locations internationally. Our registration efforts have focused on gaining protection of our trademarks for Yelp and the Yelp burst logo, among others. These marks are material to our business and essential to our brand identity as they enable others to easily identify us as the source of the services offered under these marks. We currently have limited patent protection for our core business, which may make it more difficult to assert certain of our intellectual property rights. For example, the contractual restrictions and trade secrets that protect our proprietary technology and algorithms provide only a limited safeguard against infringement.
Circumstances outside our control could pose a threat to our intellectual property rights. For example, effective intellectual property protection may not be available in the United States or other countries in which we operate. Also, the efforts we have taken to protect our proprietary rights may not be sufficient or effective. Any significant impairment of our intellectual property rights could harm our business or our ability to compete. Protecting our intellectual property rights is also costly and time consuming. Any unauthorized disclosure or use of our intellectual property could make it more expensive to do business and harm our operating results.
Companies in the Internet, technology and media industries own large numbers of patents and other intellectual property rights, and frequently request license agreements or threaten to enter into litigation based on allegations of infringement or other violations of such rights. From time to time, we receive notice letters from patent holders alleging that certain of our products and services infringe their patent rights. We are also currently subject to, and expect to face in the future, allegations that we have infringed the trademarks, copyrights, patents and other intellectual property rights of third parties, including our competitors and non-practicing entities. As we face increasing competition and as our business grows, we will likely face more claims of infringement.

Competition
The market for information regarding local businessesWe compete in rapidly evolving and advertising is intensely competitive markets, and rapidly changing. We compete for consumer trafficwe expect competition to intensify further in the future with the emergence of new technologies and market entrants. Our competitors consist of companies that help businesses — particularly businesses in our strategically important restaurants and home & local services categories — connect and engage with consumers, including:
online search engines and directories, such as Google, as well as traditional, offline local business guides and directories as well as directories;
online and offline providers of localconsumer ratings, reviews and web search. We also competereferrals, such as TripAdvisor;
providers of online marketing and tools for a share of businesses’ overallmanaging and optimizing advertising budgets with traditional, offline media companies and other Internet marketing providers. Our competitors include the following types of businesses:
Offline. Competitors include offline media companies and service providers, many of which have existing relationships with businesses. Services provided by competitors range from yellow pages listings to direct mail campaigns, to advertising and listing services in local newspapers, magazines, television and radio.

Online. Competitors also include Internet search engines, such as Google, Facebook and Bing, review and social media websites, such as Facebook,Twitter, as well as various other online service providers. These include regional websites that may have strong positions in particular markets.
forms of traditional offline advertising, including radio, direct marketing campaigns, yellow pages and newspapers;

restaurant reservation and seating tools, such as OpenTable, as well as food ordering and delivery services; and
home and/or local services-related platforms and offerings, such as ANGI Homeservices.
Our competitors may enjoy competitive advantages, such as greater name recognition, longer operating histories, substantially greater market share, established marketing relationships with, and access to, large existing user bases and substantially greater financial, technical and other resources. These companies may use these advantages to offer products similar to ours at a lower price, develop different products to compete with our current solutions and respond more quickly and effectively than we do to new or changing opportunities, technologies, standards or client requirements. Certain competitors could also use strong or dominant positions in one or more markets to gain competitive advantage against us in markets in which we operate.
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We believe our ability to compete on successfully for users, content, and advertising and other customers depends upon many factors both within and beyond our control, including:
the basispopularity, usefulness, ease of a numberuse, performance and reliability of factors. We compete for consumer traffic onour products and services compared to those of our competitors;
our ability, in and of itself as well as in comparison to the basisability of factors including: our competitors, to develop new products and services and enhancements to existing products and services;
the quantity, quality and reliability of our content; thecontent, including its breadth, depth and timeliness of information;timeliness;
our ad targeting and the strengthmeasurement capabilities, and recognitionthose of our brand. We compete for businesses’ advertising budgets on the basis of factors including: competitors;
the size, composition and level of engagement of our consumer audience; the effectivenessaudience relative to those of our advertising solutions; competitors;
our pricing structure;marketing and recognitionselling efforts, and those of our brand.competitors;
the pricing of our products and services relative to those of our competitors;
the actual or perceived return our customers receive from our products and services relative to returns from our competitors;
the frequency and relative prominence of the ads displayed by us or our competitors;
acquisitions or consolidation within our industry, which may result in more formidable competitors; and
our reputation and brand strength relative to our competitors.
Government Regulation
As a company conducting business on the Internet, we are subject to a variety of laws in the United States and abroad that involve matters central to our business, including laws regarding privacy, data retention, distribution of user-generated content, consumer protection and data protection, among others. For example:
Privacy. Because we receive, store and process personal information and other user data, including credit card information in certain cases, we are subject to numerous federal, state and local laws around the world regarding privacy and the storing, sharing, use, processing, disclosure and protection of personal information and other user data.

Liability for Third-Party Action. We rely on laws limiting the liability of providers of online services for activities of their users and other third parties.

Advertising. We are subject to a variety of laws, regulations and guidelines that regulate the way we distinguish paid search results and other types of advertising from unpaid search results.

Information Security and Data Protection. The laws in many jurisdictions require companies to implement specific information security controls to protect certain types of information. Likewise, many jurisdictions have laws in place requiring companies to notify users if there is a security breach that compromises certain categories of their information.

Many of these laws and regulations are still evolving and could be interpreted in ways that harm our business. The application and interpretation of these laws and regulations are often uncertain, particularly in the new and rapidly evolving industry in which we operate. They may be interpreted and applied inconsistently from country to country and inconsistently with our current policies and practices. For example, laws providing immunity to websites that publish user-generated content are currently being tested by a number of claims, including actions based on invasion of privacy and other torts, unfair competition, copyright and trademark infringement and other theories based on the nature and content of the materials searched, the ads posted or the content provided by users.
Similarly, new legislation and regulations may significantly impact our business. There have been various Congressional efforts to restrict the scope of the protections available to online platforms under Section 230 of the Communications Decency Act, and our current protections from liability for third-party content in the United States could decrease or change as a result.
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Regulatory frameworks for privacy issues in particular are also currently in flux worldwide, and are likely to remain so for the

foreseeable future. For example, the European Union’s General Data Protection Regulation, ("GDPR") is expected to come into forceor GDPR, which took effect in or around May 2018, and will include operational requirementsthe California Consumer Privacy Act, which took effect in January 2020, may be subject to varying interpretations and evolving practices that create uncertainty or result in significantly greater compliance burdens for companies like us that receive or process personal data of residents of the European Union that are different from those currently in place.us.
Changes in existing laws or regulations or their interpretations, as well as new legislation or regulations, may be costly to comply with and may delay or impede the development of new products, increase our operating costs and require significant management time and attention. Such changes could also make it more difficult for consumers to use our platform, resulting in less traffic and revenue, or make it more difficult for us to provide effective advertising tools to businesses on our platform, resulting in fewer advertisers and less revenue. As our business grows and evolves, we will also become subject to additional laws and regulations, including in jurisdictions outside of the United States. Foreign data protection, privacy and other laws and regulations can be more restrictive than those in the United States, as is the case with GDPR. Any failure on our part to comply with these laws may subject us to significant liabilities.
Our Culture and Employees
We take great pride in our company culture and consider it to be one of our competitive strengths. Our culture is at the foundation of our success, and it continues to help drive our business forward as a pivotal part of our everyday operations. It allows us to attract and retain a talented group of employees, create an energetic work environment and continue to innovate in a highly competitive market. As of December 31, 2017,2019, we had 5,196 salaried5,950 employees and 127 non-salaried support staff globally.
Our culture extends beyond our offices and into the local communities in which people use Yelp. Our community management team’s responsibilities include supporting the sharing of experiences by consumers in the local markets that they serve and increasing brand awareness. We organize events several times a year to recognize our most important contributors, facilitating face-to-face interactions, building the Yelp brand and fostering the sense of true community in which we believe so strongly. We also engage with small businesses. For example, we established the Yelp Small Business Advisory Council as a wayattend conferences and events hosted by industry groups to interact with and get feedback from our core community of local business owners. We also work with the U.S. Small Business Administration and other partners to educate small business owners across the United States on best practices for online marketing.
In addition, The Yelp Foundation, or the Foundation, a non-profit organization established by our board of directors in November 2011, (the "Foundation"), directly supports consumers and local businesses in the communities in which we operate. In 2011, our board of directors approved the contribution and issuance to the Foundation of 520,000 shares of our common stock, of which the Foundation had sold 187,500247,500 shares as of December 31, 2017.2019. The Foundation uses the proceeds from the sale of its shares of our common stock to make grants to local non-profit organizations that are actively engaged in supporting community and small business growth. As of December 31, 2017,2019, the Foundation held 332,500272,500 shares of common stock, representing less than 1% of our outstanding capital stock.
Information About SegmentSeasonality and Geographic Revenue
Information about segment and geographic revenue is set forth in Note 18 of the Notes to Consolidated Financial Statements included elsewhere in this Annual Report.
SeasonalityCyclicality
Our business is affected both by cyclicality in business activity and by seasonal fluctuations in Internet usage and advertising spending. We believe our rapid growth has masked most of thespending, as well as cyclicality and seasonality of our business. As our business matures, we expect that the cyclicality and seasonality in our business may become more pronounced, causing our operating results to fluctuate. In particular, basedeconomic activity. Based on historical trends, we expect traffic numbers to be weakest in the fourth quarter of the year in connection with end of the year holidays. In addition, although our multi-location customers tend to increase spending on advertising in the fourth quarter, the small and medium-sized business, or SMBs, on which we rely heavily typically decrease their advertising spending during this quarter. In 2019, we experienced a more pronounced impact on our fourth quarter advertising revenue from seasonal decreases in advertising spending by SMBs than in prior years, which we believe was the result of more customers being on non-term contracts.
SMBs have also historically experienced high failure rates, and we must continually add new advertisers to replace those who do not renew their advertising due to factors outside of our control, such as declining advertising budgets, closures or bankruptcies. As a result, SMBs may be disproportionately affected by negative fluctuations in the business cycle, and a worsening economic outlook would likely cause such businesses to decrease investments in advertising, which would adversely affect our revenue.
We believe our rapid growth has masked most of the seasonality and cyclicality of our business. As our business matures and the proportion of our customers who can cancel their ad campaigns at any time increases, we expect that the seasonality and cyclicality in our business may become more pronounced, causing our operating results to fluctuate.
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Corporate and Available Information
We were incorporated in Delaware on September 3, 2004 under the name Yelp, Inc. We changed our name to Yelp! Inc. in late September 2004 and to Yelp Inc. in February 2012. Our principal executive offices are located at 140 New Montgomery Street, 9th Floor, San Francisco, California 94105, and our telephone number is (415) 908-3801. Our website is located at www.yelp.com, and our investor relations website is located at www.yelp-ir.com.
We file or furnish electronically with the U.S. Securities and Exchange Commission, ("SEC")or SEC, annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act. We make copies of these reports available free of charge through our investor relations

website as soon as reasonably practicable after we file or furnish them with the SEC. All materials we file withThese reports are also accessible through the SEC are availablewebsite at the SEC’s Public Reference Room at 100 F Street, NE, Washington, DC 20549. Information on the operation of the Public Reference Room can be obtained by calling the SEC at 1-800-SEC-0330.www.sec.gov.
We webcast our earnings calls and certain events we participate in or host with members of the investment community on our investor relations website. Additionally, we provide notifications of news or announcements regarding our financial performance, including filings with the SEC, investor events, press and earnings releases, and blogs as part of our investor relations website. Investors and others can receive notifications of new information posted on our investor relations website in real time by signing up for e-mail alerts and RSS feeds.
Information contained on or accessible through our websites is not incorporated into, and does not form a part of, this Annual Report or any other report or document we file with the SEC, and any references to our websites are intended to be inactive textual references only.



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Item 1A. Risk Factors.Factors

Risks Related to Our Business and Industry

If we are unable to increase traffic to our mobile app and website, or user engagement on our platform declines, our revenue, business and operating results may be harmed.
We derive substantially alla substantial majority of our revenue frombased on our users' engagement with the sale of our advertising products.ads that we display. Because traffic to our platform determinesand user engagement on our platform together determine the number of ads we are able to show, affectsaffect the value of those ads to businesses and influencessupport the content creation that drives further traffic, slower traffic growth rates may harmour ability to attract, retain and engage visitors on our platform is critical to our business and financial results. Oursuccess. A number of factors could adversely affect our traffic could be adversely affected by factors including:and user engagement, including, but not limited to:

if they fail to drive sufficient traffic to our platform in the future, we may need to increase our marketing spend to acquire additional traffic. We cannot assure you that the value we ultimately derive from any such additional traffic would exceed the cost of acquisition, and any increase in marketing expense may harm our operating results as a result.

Quality of Our Content. Our ability to attract consumer traffic depends on the quantity and quality of the content contributed by our users. Our ability to provide consumers with valuable content may be harmed:

if our users do not contribute content that is helpful or reliable;
if our users remove content they previously submitted; and
as a result of user concerns that they may be harassed or sued by the businesses they review, instances of which have occurred in the past and may occur again in the future.
In addition, if our platform does not provide current information about local businesses or users do not perceive reviews on our platform as relevant, our business could be harmed. For example, we do not phase out or remove dated reviews, and consumers may view older reviews as less relevant, helpful or reliable than more recent reviews.
Increasing Competition. The market for information regarding local businesses is intensely competitive and rapidly changing. If the popularity, usefulness, ease of use, performance and reliability of our products and services do not compare favorably to those of our competitors, traffic may decline.

Our Recommendation Software. If our automated software does not recommend helpful content or recommends unhelpful content, consumers may reduce or stop their use of our platform. While we have designed our technology to avoid recommending content that we believe to be unreliable or otherwise unhelpful, we cannot guarantee that our efforts will be successful. For example, if robots, shills or other spam accounts are able to contribute a significant amount of recommended content, or consumers perceive a significant amount of our recommended content to be from such accounts, our traffic and revenue could be negatively affected. Although we do not believe content from these sources has had a material impact to date, if our automated software recommends a substantial amount of such content in the future, our ability to provide high quality content would be harmed and the consumer trust essential to our success could be undermined.

Content Scraping. From time to time, other companies copy information from our platform without our permission, through website scraping, robots or other means, and publish or aggregate it with other information for their own benefit. This may make them more competitive and may decrease the likelihood that consumers will visit our platform to find the local businesses and information they seek. This may also result in increases to our reported traffic metrics that do not represent increases in consumer usage of our platform. For example, we discovered that a portion of our reported desktop traffic from the third quarter of 2016 through the first quarter of 2017 was attributable to a single robot, which did not represent valid consumer traffic. Though we strive to detect and prevent this third-party conduct, we may not be able to detect it in a timely manner and, even if we could, may not be able to prevent it. In some cases, particularly in the case of third parties operating outside of the United States, our available remedies may be inadequate to protect us against such conduct.


Macroeconomic Conditions. Consumer purchases of discretionary items generally decline during recessions and other periods in which disposable income is adversely affected. As a result, adverse economic conditions may impact consumer spending, particularly with respect to local businesses, which in turn could adversely impact the number of consumers visiting our platform.

Review Concentration. Our restaurant and shopping categories together accounted for approximately 38% of the businesses that had received reviews and approximately 56% of the reviews available on our platform as of December 31, 2017. Although these categories generate a substantial portion of our traffic, if the high concentration of reviews generates a perception that our platform is primarily limited to these categories, our traffic may not increase to the extent otherwise possible.

Internet Access. The adoption of any laws or regulations that adversely affect the growth, popularity or use of the Internet, including the recent repeal of Internet neutrality regulations in the United States, could decrease the demand for our services. Similarly, any actions by companies that provide Internet access that degrade, disrupt or increase the cost of user access to our platform could undermine our operations and result in the loss of traffic.

High Penetration Rates. We have already entered most major geographic markets within the United States and Canada, and we do not expect to pursue expansion in other international markets in the foreseeable future. Further expansion in smaller markets may not yield similar results or sustain our growth.

We anticipate that our traffic growth rate will continue to slow over time, and potentially decrease in certain periods, as our business matures. As our traffic growth rate slows, our success will become increasingly dependent on our ability to increase levels of user engagement on our platform, which may be negatively impacted if:
users engage with other products, services or activities as an alternative to our platform;
there is a decrease in the perceived quality of the content contributed by our users;
if we fail to introduce new and improved products or features that users find engaging, or we introduce new products or features that do not effectively address consumer needs or otherwise alienate consumers;consumers;
the quantity and quality of the content contributed by our users, as well as the perceived distribution of such content across the categories of businesses on our platform;
increasing competition in the market for information regarding local businesses;
our ability to manage and prioritize information to ensure users are presented with content that is relevant and helpful to them, including through the effective operation of our automated recommendation software;
technical or other problems that negatively impact the availability and reliability of our platform or otherwise affect the user experience;experience, including as a result of infrastructure performance problems and security breaches;
if users have difficulty installing, updating or otherwise accessing our platform as a result of actions by us or third parties that we rely on to distribute our products;products, such as application marketplaces and device manufacturers;
if users believe that their experience is diminished as a result of the decisions we make with respect to the frequency, relevance and prominence of the advertising we display;
adverse macroeconomic conditions and their negative impact on consumer spending at local businesses;
the adoption of any laws or regulations that adversely affect the growth, popularity or use of our platform or the Internet in general, such as the repeal of Internet neutrality regulations in the United States;
any actions taken by companies with significant market power in the broadband and Internet marketplace that degrade, disrupt or increase the cost of user access to our products and services; and
if we do not maintain our brand image or our reputation is damaged.damaged.

We anticipate that our traffic growth rate will continue to slow over time, and potentially decrease in certain periods due to the maturation of our business and our high penetration rates in most major geographic markets within the United States and Canada. As our traffic growth rate slows, our business and financial performance will become increasingly dependent on our ability to increase levels of user engagement with our platform and the ads that we display.

We generate substantially all of our revenue from advertising. If we fail to maintain and expand our base of advertisers, our revenue and our business will be harmed.
Our abilityIn order to maintain and expand our advertiser base, depends on factors including:
Acceptance of Online Advertising. We believe that the continued growth and acceptance of our online advertising products will depend on the perceived effectiveness and acceptance of online advertising models generally, which is outside of our control. Many advertisers still have limited experience with online advertising and, as a result, may continue to devote significant portions of their advertising budgets to traditional, offline advertising media, such as newspapers or print yellow pages directories.

Competitiveness of Our Products. We must deliver ads in an effective manner at prices that compare favorably to those of our competitors. The widespread adoption of any technologies that make it more difficult for us to deliver ads, such as ad-blocking programs, could decrease our value proposition to businesses and reduce demand for our products. We may also be unable to attract new advertisers if our products are not compelling or we fail to innovate and introduce enhanced products meeting advertiser expectations. For example, in their current form, our ad products may be most attractive to businesses with higher than average ratings and numbers of reviews. As a result, businesses with lower ratings and fewer reviews may not purchase our ad products, or may abandon them if they do not believe our ad products are effective.


Availability and Accuracy of Analytics. We must convince existing and prospective advertisers alike that our advertising products offer them a material benefit and can generate a competitive return relative to other alternatives. ToWe sell ads primarily on a CPC basis, the pricing of which depends, in part, on competition among advertisers through an auction mechanism. Demand for ads in certain business categories that receive lower levels of traffic can exceed our inventory,
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resulting in relatively high prices for ads in those categories. Such prices reduce our competitiveness and we may not be able to retain advertisers who frequently encounter them. This issue may be exacerbated by any changes to search engine algorithms and methodologies that have the effect of further reducing traffic to impacted categories.
Advertisers will not advertise with us, or they will reduce the prices they are willing to pay to advertise with us, if we do so,not deliver compelling ad products in an effective manner, or if we mustdo not provide accurate, easy-to-use analytics and measurement solutions that demonstrate the effectiveness and value of our advertising products compared to those of our competitors.

Traffic Quality. The success of our advertising program depends on delivering positive results to our advertising customers. Low-quality or invalid traffic, such as robots, spiders and the mechanical automation of clicking, may be detrimental to our relationships with advertisers and could adversely affect our advertising pricing and revenue. For example, we discovered that, beginning in the third quarter of 2016, a portion of our desktop traffic has been attributable to a single robot. While we do not believe the traffic from this robot represents a material amount of our overall reported traffic or has impacted our ad delivery, our delay in detecting and removing such traffic may harm our reputation among advertisers. Similarly, if we fail to detect and prevent click fraud or other invalid clicks on ads, the affected advertisers may experience or perceive a reduced return on their investments, which could lead to dissatisfaction with our products, refusals to pay, refund demands or withdrawal of future business.

Perception of Our Platform. Our ability to compete effectively for advertiser budgets depends on our reputation and perceptions regarding our platform. For example, because we make the consumer experience our highest priority, unless we believe that a review violates our terms of service, we will allow the review to remain on our platform even if the business disputes its accuracy. Certain advertisers may therefore perceive our policies as an impediment to their success, which may harm our ability to attract and retain advertisers. The ratings and reviews that businesses receive from our users may also affect their advertising decisions. Favorable ratings and reviews, on the one hand, could be perceived as obviating the need to advertise. Unfavorable ratings and reviews, on the other, could discourage businesses from advertising to an audience that they perceive as hostile or cause them to form a negative opinion of our products and user base.

Macroeconomic Conditions. Adverse macroeconomic conditions can have a negative impact on the demand for advertising, particularly with respect to online advertising products. We rely heavily on small and medium-sized businesses, which often have limited advertising budgets and may view online advertising as lower priority than offline advertising. Such businesses have also historically experienced high failure rates and may be disproportionately affected by economic downturns. As a result, we must continually add new advertisers to replace advertisers who do not renew their advertising due to factors outside of our control, such as declining advertising budgets, closures and bankruptcies.

As is typical in our industry, our advertisers generally do not have long-term obligations to purchase our products. Inproducts; in fact, anas a result of our transition to non-term contracts for most of our new local advertising customers in May 2018, a substantial and increasing portion of our advertisers have the ability to cancel their ad campaigns at any time whichwithout penalty. As a result, any decrease in customer satisfaction, economic downturn or other change negatively affecting our ability to retain advertisers may negatively impact advertiser retentionhave an earlier and more concentrated effect on our results going forward than prior to our transition to non-term contracts, when our multi-month advertising contracts imposed a fee for early cancellations. If we are unable to quickly and effectively respond to such developments, our ability to maintain and expand our advertiser base.base will be harmed. In addition, the negative impact of attrition on our financial results may be greater with respect to advertisers who are billed in arrears, as the vast majority of our advertisers now are, if they fail to make payment on ads that have already been delivered.
In addition, our advertiser base consists primarily of SMBs, which are subject to increased challenges and risks. SMBs often have limited advertising budgets and view online advertising products like ours as experimental and unproven; as a result, we may need to devote additional time and resources to educate them about our products and services. Such businesses have also historically experienced high failure rates, and we must continually add new advertisers to replace those who do not renew their advertising due to factors outside of our control, such as declining advertising budgets, closures and bankruptcies.
Our advertising revenue could be impacted by a number of other factors, including, but not limited to:
the perceived effectiveness and acceptance of online advertising generally, particularly among SMBs that may have less experience with it;
our ability to increase traffic to our platform and user engagement, including engagement with the ads displayed on our platform;
the effectiveness of our ad targeting technology and tools for advertisers to optimize their campaigns;
our ability to innovate and introduce enhanced products meeting advertiser expectations;
product changes or inventory management decisions we may make that change the size, format, frequency or relative prominence of ads displayed on our platform;
the widespread adoption of any technologies that make it more difficult for us to deliver ads, such as ad-blocking programs;
loss of advertising business to our competitors, including if competitors offer lower priced or more integrated products;
the prevalence of low-quality or invalid traffic on our platform, such as robots and spiders, which we have discovered in the past and expect to discover in the future, and our ability to detect and prevent click fraud or other invalid clicks on ads;
our reputation and perceptions regarding our platform, including of the ratings and reviews that businesses receive from our users — favorable ratings and reviews could be perceived as obviating the need to advertise, while unfavorable ratings and reviews could discourage businesses from advertising to an audience that they perceive as hostile;
the size and effectiveness of our sales force, which may be affected by a range of factors, not all of which are within our control, including:
the employment market in cities where our sales offices are located;
our sales force's ability to connect with potential customers' key decision makers, which may be harmed if such decision makers, their telecommunications carriers or their mobile operating systems increase their use of call
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blocking technologies, or decision makers answer their phones less frequently to avoid, for example, calls from unknown numbers, telemarketing calls, calls from political campaigns and other solicitations; and
catastrophic occurrences, such as earthquakes or fires, and major public health issues that negatively impact the productivity of our sales force;
the degree to which businesses choose to reach users through our free products in lieu of our paid products and services; and
adverse macroeconomic conditions, which may disproportionately affect the SMBs on which we rely.
Any of these or other factors could result in a reduction in demand for our products, which may reduce the prices we are able to charge, either of which would negatively affect our revenue and operating results.

Our ability to increase our revenue depends on our ability to introduce successful new products and services. Our ongoing investments in developing products and services, including products and services outside of our historical core business. Our ongoing investment in such products and services involvesbusiness, involve significant risks, could disrupt our current operations and may not produce the long-term benefits that we expect.
Our industry is rapidly evolving and intensely competitive; our ability to compete successfully and increase our revenue depends on our ability to continue to deliver innovative, relevant and useful products to our customers in a timely manner. As a result, we have invested, and expect to continue to invest, significant resources in newdeveloping products and services includingto drive traffic to our platform and engage our users. Our product development efforts may include significant changes to our existing products and servicesor new products that are unproven or that are outside of our historical core business, such as our planned investments in Yelp Reservations Yelp Nowait and Yelp WiFi Marketing in 2018.Waitlist. Such investments may not prioritize short-term financial results and may involve significant risks and uncertainties, including distracting management and reducing investment indisrupting our core business. Anycurrent operations. We cannot assure you that any resulting new or enhanced products and services will engage users and advertisers. We may fail to generate sufficient revenue, operating margin or other value to justify our investments in them,such products, thereby harming our ability to generate revenue both directly and, with respect to investments in products outside of our core business, indirectly as a result of foregoing the missed opportunity for higher investment in our core advertising business, in other product lines and other initiatives.

We rely on Internet search engines and application marketplaces to drive traffic to our platform, certain providers of which offer products and services that compete directly with our products. If links to our applications and website are not displayed prominently, traffic to our platform could decline and our business would be adversely affected.
We rely heavily on Internet search engines, such as Google, to drive traffic to our platform through their unpaid search results and on application marketplaces, such as Apple’s App Store and Google’s Play, to drive downloads of our applications. Although search results and application marketplaces have allowed us to attract a large audience with low organic traffic acquisition costs to date, if they fail to drive sufficient traffic to our platform, we may need to increase our marketing spend to acquire additional traffic. We cannot assure you that the value we ultimately derive from any such additional traffic would exceed the cost of acquisition, and any increase in marketing expense may in turn harm our operating results.
The amount of traffic we attract from search engines is due in large part to how and where information from and links to our website are displayed on search engine result pages. The display, including rankings, of unpaid search results can be affected by a number of factors, many of which are not in our direct control, and may change frequently. Search engines have made changes in the past to their ranking algorithms, methodologies and design layouts that have reduced the prominence of links to our platform and negatively impacted our traffic, and we expect they will continue to make such changes from time to time in the future. For example, we believe Google's update to its search algorithm in the fourth quarter of 2019 may have harmed and may be continuing to harm our traffic. Similarly, Apple, Google or other marketplace operators may make changes to their marketplaces that make access to our products more difficult. For example, our applications may receive unfavorable treatment compared to the promotion and placement of competing applications, such as the order in which they appear within marketplaces.
We may not know how or otherwise be in a position to influence search results or our treatment in application marketplaces. With respect to search results in particular, even when search engines announce the details of their methodologies, their parameters may change from time to time, be poorly defined or be inconsistently interpreted. For example, Google previously announced that the rankings of sites showing certain types of app install interstitials could be penalized on its mobile search results pages. While we believe the type of interstitial we currently use is not being penalized, we cannot guarantee that Google will not unexpectedly penalize our app install interstitials, causing links to our mobile website to be featured less prominently in Google’s mobile search results and harming traffic to our platform as a result.
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In some instances, search engine companies and application marketplaces may change their displays or rankings in order to promote their own competing products or services or the products or services of one or more of our competitors. For example, Google has integrated its local product offering with certain of its products, including search and maps. The resulting promotion of Google’s own competing products in its web search results has negatively impacted the search ranking of our website. Because Google in particular is the most significant source of traffic to our website, accounting for a substantial portion of the visits to our website, our success depends on our ability to maintain a prominent presence in search results for queries regarding local businesses on Google. As a result, Google’s promotion of its own competing products, or similar actions by Google in the future that have the effect of reducing our prominence or ranking on its search results, could have a substantial negative effect on our business and results of operations.

We face intense competition in rapidly evolving markets, and expect competition to increase in the future.
We compete in rapidly evolving and intensely competitive markets, and we expect competition to intensify further in the future with the emergence of new technologies and market entrants. We face competition for users, content, and advertising and other customers, including from: online search engines and directories; traditional, offline business guides and directories; online and offline providers of consumer ratings, reviews and referrals; providers of online marketing and tools for managing and optimizing advertising campaigns; various forms of traditional offline advertising; restaurant reservation and seating tools; food ordering and delivery services; and home and/or local services-related platforms and offerings.
Our competitors may enjoy competitive advantages, such as greater name recognition, longer operating histories, substantially greater market share, large existing user bases and substantially greater financial, technical and other resources. These companies may use these advantages to offer products similar to ours at a lower price, develop different products to compete with our current solutions and respond more quickly and effectively than we do to new or changing opportunities, technologies, standards or client requirements. In particular, major Internet companies, such as Google, Facebook, Amazon and Microsoft, may be more successful than us in developing and marketing online advertising and other services directly to local businesses, and may leverage their relationships based on other products or services to gain additional share of advertising budgets.
Certain competitors could also use strong or dominant positions in one or more markets to gain competitive advantage against us in areas in which we operate, including by:
integrating review platforms or features into products they control, such as search engines, web browsers or mobile device operating systems;
making acquisitions;
changing their unpaid search result rankings to promote their own products;
refusing to enter into or renew licenses on which we depend;
limiting or denying our access to advertising measurement or delivery systems;
limiting our ability to target or measure the effectiveness of ads; or
making access to our platform more difficult.
These risks may be exacerbated by the trend in recent years toward consolidation among online media companies, potentially allowing our larger competitors to offer bundled or integrated products that feature alternatives to our platform.
To compete effectively, we must continue to invest significant resources in product development to enhance user experience and engagement, as well as sales and marketing to expand our base of advertisers. However, there can be no assurance that we will be able to compete successfully for users and customers against existing or new competitors, and failure to do so could result in loss of existing users, reduced revenue, increased marketing expenses or diminished brand strength, any of which could harm our business.

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We rely on third-party service providers and strategic partners for many aspects of our business, and any failure to maintain these relationships could harm our business.
We rely on relationships with various third parties to grow our business, including strategic partners and technology and content providers. For example, we rely on third parties for data about local businesses, mapping functionality, payment processing, information technology and systems, network infrastructure and administrative software solutions. We also rely on partnership integrations for various transactions available through Yelp, including Grubhub for food-ordering services. Identifying, negotiating and maintaining relationships with third parties require significant time and resources, as does integrating their data, services and technologies onto our platform. For example, the ongoing maintenance of the Grubhub integration may require significant time, resources and expense, and may divert the attention of our management and employees from other aspects of our business operations. In addition, there can be no assurance that we will be able to continue to realize the intended benefits of the Grubhub partnership.
It is possible that third-party providers and strategic partners may not be able to devote the resources we expect to the relationships. We may also have competing interests and obligations with respect to certain of our partners, which may make it difficult to maintain, grow or maximize the benefit for each partnership. For example, our entry into the online reservations space with our acquisition of SeatMe, Inc. in 2013 put us in competition with OpenTable, which led to the end of our partnership with OpenTable in 2015. Our focus on establishing additional partnerships to help accelerate our growth initiatives may exacerbate this risk. If our relationships with our partners and providers deteriorate, we could suffer increased costs and delays in our ability to provide consumers and advertisers with content or similar services. As in the case of the expiration or termination of any of our agreements with third-party providers, transitioning from one partner or provider to another could subject us to operational delays and inefficiencies and we may not be able to replace the services provided to us in a timely manner or on terms that are favorable to us, if at all.
In addition, we exercise limited control over our third-party partners and vendors, which makes us vulnerable to any errors, interruptions or delays in their operations. If these third parties experience any service disruptions, financial distress or other business disruption, or difficulties meeting our requirements or standards, it could make it difficult for us to operate some aspects of our business. For example, we rely on a single supplier to process payments of all transactions made through Yelp. Any disruption or problems with this supplier or its services could have an adverse effect on our reputation, results of operations and financial results. Similarly, the actions of our partners may affect our brand if users or customers do not have a positive experience interacting with or through them. For example, if advertisers do not have a positive experience purchasing our advertising products through our resale partners, such as Thryv, or the agency participants in our Yelp Ads Certified Partners Program, they may not continue advertising with us, which would negatively affect our revenue and operating results. Although such partners are contractually obligated to observe certain standards and best practices while selling our advertising products, our ability to ensure their compliance is limited. Any disagreements or disputes with these or other partners about our respective contractual obligations — which we have had in the past and may have again from time to time in the future — could result in legal proceedings or negatively affect our brand and reputation.

Our strategy to grow our business may not be successful and may expose us to additional risks.
Our strategy to grow our business includes priorities such as winning in our key categories of restaurants and home & local services, providing more value to our business customers and focusing on our multi-location and self-serve sales channels. These initiatives involve risks and executing on them may prove more difficult than we currently anticipate. We may not succeed in realizing the benefits of these efforts, including growing our revenue and improving our margins, within the time frame we expect or at all.
We will face both execution and industry challenges in our efforts to win in our key categories. For example, developing comprehensive restaurant and home & local services solutions may require substantial investments and significant changes to our existing platform, products and content, and our development efforts in one category may not translate to the other. The restaurants and home & local services markets themselves will also present significant hurdles. In addition to being highly competitive, fragmented industries, neither has yet fully embraced online solutions of the type we offer. The majority of restaurants and diners continue to use the traditional offline ordering and booking methods involving the telephone, paper menus that restaurants distribute to diners and pen-and-paper or other offline reservation books. Similarly, many of our consumers continue to search for, select and hire service professionals offline through word-of-mouth and referrals. Changing traditional habits is difficult, and the speed and ultimate outcome of the shift of these markets online for consumers and businesses alike is uncertain and may not occur as quickly as we expect, or at all. Even if we are successful in developing comprehensive solutions and overcoming industry challenges in these categories, we may not realize the benefits that we expected from pursuing this strategy or may not realize them within a reasonable time. For example, the traffic and engagement
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driven by our offerings in the restaurants category may not result in higher traffic and engagement in our higher-value home & local services category as we expect.
Although our initiatives to provide more value to our customers and emphasize alternative sales channels are more similar to our historical advertising business than our restaurants and home & local services initiatives, both involve unfamiliar risks. Our efforts to optimize CPC prices and provide advertisers more value for their money may include lowering prices while making significant investments in product development. We cannot guarantee that any resulting increase in demand for our products or customer retention will offset lower prices or otherwise generate sufficient revenue to justify our investments. Likewise, emphasizing our multi-location and self-serve channels involves changes to our sales organization and sales force hiring priorities. These changes may be disruptive to our sales operations and affect our ability to generate revenue.
Certain of our past strategic decisions may also continue to impact our opportunities and long-term prospects. For example, while our sale of Eat24 has resulted in cost savings, it has also resulted in a substantial reduction in our transactions revenue, which will not be fully offset by revenue from our Grubhub partnership for the foreseeable future. We cannot predict the impact that fully outsourcing food ordering on our platform may have on our brand and reputation. In addition, we wound down our international sales and marketing operations in 2016 and reallocated the associated resources primarily to our U.S. and Canadian markets. While our decision to focus our sales and marketing resources primarily on the United States and Canada has resulted in some cost savings, it also limits the markets from which we generate revenue and our ability to expand internationally in the future. Our continued growth depends on our ability to further develop our U.S. and Canadian communities and operations for the foreseeable future. However, our communities in many of the largest markets in the United States and Canada are in a relatively late stage of development, and further development of smaller markets may not yield similar results. If we are not able to develop these markets as we expect, or if we fail to address the needs of those markets, our business will be harmed.

Consumers are increasingly accessing online services through a variety of platforms other than desktop computers, including mobile devices. If we are unable to operate effectively on such devices or our products for such devices are not compelling, our business could be adversely affected.
The number of people who access information about local businessesthe Internet through devices other than desktop computers, including mobile phones, tablets, handheld computers, voice-assisted speakers, automobiles and television set-top devices, is increasing dramatically. has increased dramatically in the past several years. We generate a substantial majority of our revenue from advertising delivered on mobile devices and anticipate that growth in use of our mobile platform in particular will continue to be the driver of our growth for the foreseeable future and that usage through desktop computers may continue to decline.future. As a result, we must continue to drive adoption of and

user engagement on our mobile platform, and on our mobile app in particular.particular, which is less reliant on search results for traffic than our website. If we are unable to drive continued adoption of and engagement on our mobile app, our business may be harmed and we may be unable to decrease our reliance on traffic from Google and other search engines.
In order to attract and retain engaged users of our platform on mobile platform and on other alternative devices, the products and services we introduce on such devices must be compelling. However, the functionality and user experience associated with some alternative devices such as smaller screen size or lack of a screen, may make the use of our platform and products through such devices more difficult than through a desktop computer. In addition, weFor example, devices with small screen sizes or that lack a screen may exacerbate the risks associated with how and where our website is displayed in search results because they display or otherwise present fewer search results than desktop computers. We also expect that the ways in which users engage with our platform will continue to change over time as users increasingly engage via alternative devices. This may make it more difficult to develop products that consumers find useful, or provide them with the information they seek,may make it more difficult for us to monetize our products and may also negatively affect our content if users do not continue to contribute high quality content through such devices.
Similarly, as new devices and platforms develop, advertiser demand may increase for products that we do not offer or that may alienate our user base, which we must balance against our commitment to prioritizing the quality of user experience over short-term monetization. If we are not able to balance these competing considerations successfully to develop compelling advertising products, advertisers may stop or reduce their advertising with us and we may not be able to generate meaningful revenue from alternative devices despite the expected growth in their usage.
As new devices and platforms are continually being released, it is also difficult to predict the problems we may encounter in adapting our products and services — and developing competitive new products and services — to them, and we may need to devote significant resources to the creation, support and maintenance of such products. Our success will be dependent on the interoperability of our products with a range of technologies, systems, networks and standards that we do not control, such as mobile operating systems like Android and iOS. We may not be successful in developing products that operate effectively with these technologies, systems, networks and standards or in creating, maintaining and developing relationships with key
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participants in related industries, some of which may be our competitors. If we experience difficulties or increased costs in integrating our products into alternative devices, or if manufacturers elect not to include our products on their devices, make changes that degrade the functionality of our products, give preferential treatment to competitive products or prevent us from delivering advertising, our user growth and operating results may be harmed. This risk may be exacerbated by the frequency with which users change or upgrade their devices; in the event users choose devices that do not already include or support our platform or do not install our products when they change or upgrade their devices, our traffic and user engagement may be harmed.
In addition,
If we fail to generate, maintain and recommend sufficient content from our users that consumers find relevant, helpful and reliable, our traffic and revenue will be negatively affected.
Our success depends on our ability to attract consumer traffic with valuable content, which in turn depends on the market for advertising products on mobilequantity and other devices remains a rapidly evolving market. As new devicesquality of the content provided by our users, as well as consumer perceptions of the relevance, helpfulness and platforms are released,reliability of that content. We may be unable to provide consumers with valuable information if our users do not contribute sufficient content or if our users remove content they previously submitted. For example, users may begin consumingbe unwilling to contribute content as a result of concerns that they may be harassed or sued by the businesses they review, instances of which have occurred in a manner that is more difficultthe past and may occur again in the future. Consumers also may not find the content on our platform to monetize. Similarly,be valuable if they do not perceive it as advertising products for mobile and other platforms develop, demand may increase for products thatrelevant, helpful or reliable. For example, we do not offerphase out or remove dated reviews, and consumers may view older reviews as less relevant or reliable than more recent reviews. If the high concentration of reviews in our restaurants and shopping categories creates a perception that our platform is primarily limited to these categories, consumers may not believe that we can provide them with helpful information about businesses in other categories and seek that information elsewhere.
Our automated recommendation software is a critical part of our efforts to provide consumers with relevant, helpful and reliable content. However, although we have designed our technology to avoid recommending content that we believe to be biased, unreliable or otherwise unhelpful, we cannot guarantee that our efforts will be successful, or that each of the recommended reviews available on our platform at any given time is useful or reliable. If our automated software does not recommend helpful content or recommends unhelpful content, consumers may alienatereduce or stop their use of our user base, whichplatform. For example, if robots, shills or other spam accounts are able to contribute a significant amount of recommended content, or consumers perceive a significant amount of our recommended content to be from such accounts, our traffic and revenue could be negatively affected. Although we must balance againstdo not believe content from these sources has had a material impact to date, if our commitmentautomated software recommends a substantial amount of such content in the future, our ability to prioritizingprovide high quality content would be harmed and the quality of user experience over short-term monetization. Ifconsumer trust essential to our success could be undermined.
Even if we are not ablesuccessful in our efforts to balance these competing considerations successfullygenerate, maintain and recommend valuable content, our ability to develop compelling advertising products, advertisersattract consumer traffic may stopnonetheless be harmed if consumers can find equivalent content through other services. From time to time, other companies copy information from our platform without our permission, through website scraping, robots or reduceother means, and publish or aggregate it with other information for their advertising with usown benefit. This may make them more competitive and may decrease the likelihood that consumers will visit our platform to find the local businesses and information they seek. Though we strive to detect and prevent this third-party conduct, we may not be able to generate meaningful revenue from alternative devices despite the expected growth in their usage.
We rely on Internet search engines and application marketplaces to drive traffic to our platform, certain providers of which offer products and services that compete directly with our products. If links to our applications and website are not displayed prominently, traffic to our platform could decline and our business would be adversely affected.
Our success depends in part on our ability to attract users through unpaid Internet search results on search engines like Google and Bing. The number of users we attract from search engines to our website (including our mobile website) is due in large part to how and where information from and links to our website are displayed on search engine result pages. The display, including rankings, of unpaid search results can be affected by a number of factors, many of which are not in our direct control, and may change frequently. For example, a search engine may change its ranking algorithms, methodologies or design layouts. As a result, links to our platform may not be prominent enough to drive traffic to our platform, and we may not know how or otherwise bedetect it in a position to influence the results.
For example, Google has previously made changes to its algorithmstimely manner and, methodologies that may be contributing to the slowing of our traffic growth rate. Google also previously announced that the rankings of sites showing certain types of app install interstitials could be penalized on its mobile search results pages. While we believe the type of interstitial we currently use is not being penalized, the parameters of Google’s policy may change from time to time, be poorly defined and be inconsistently interpreted. As a result, Google may unexpectedly penalize our app install interstitials, which may cause links to our mobile website to be featured less prominently in Google’s mobile search results page, and traffic to both our mobile website and mobile app may be harmed as a result. We cannot predict the long-term impact of these changes.
Although traffic to our mobile app is less reliant on search results than traffic to our website, growth in mobile device usage may not decrease our overall reliance on search results if mobile users use our mobile website rather than our mobile app. In fact, consumers’ increasing use of mobile devices may exacerbate the risks associated with how and where our website is displayed in search results because mobile device screens are smaller than personal computer screens and therefore display fewer search results.

We also rely on application marketplaces, such as Apple’s App Store and Google’s Play, to drive downloads of our applications. In the future, Apple, Google or other marketplace operators may make changes to their marketplaces that make access to our products more difficult. For example, our applications may receive unfavorable treatment compared to the promotion and placement of competing applications, such as the order in which they appear within marketplaces. Similarly, if problems arise in our relationships with providers of application marketplaces, our user growth could be harmed.
In some instances, search engine companies and application marketplaces may change their displays or rankings in order to promote their own competing products or services or the products or services of one or more of our competitors. For example, Google has integrated its local product offering with certain of its products, including search and maps. The resulting promotion of Google’s own competing products in its web search results has negatively impacted the search ranking of our website. Because Google in particular is the most significant source of traffic to our website, accounting for a substantial portion of the visits to our website during the three months ended December 31, 2017, our success depends on our ability to maintain a prominent presence in search results for queries regarding local businesses on Google. As a result, Google’s promotion of its own competing products, or similar actions by Google in the future that have the effect of reducing our prominence or ranking on its search results, could have a substantial negative effect on our business and results of operations.
If we fail to further develop our domestic markets effectively, our revenue and business will be harmed.
In the fourth quarter of 2016, we wound down our international sales and marketing operations and reallocated the associated resources primarily to our U.S. and Canadian markets. As a result, our continued growth depends on our ability to further develop our U.S. and Canadian communities and operations. However, our communities in many of the largest markets in the United States and Canada are in a relatively late stage of development, and further development of smaller markets may not yield similar results. If we are not able to develop these markets as we expect, oreven if we fail to address the needs of those markets, our business will be harmed.
We face competition for both local business directory traffic and advertiser spending, and expect competition to increase in the future.
The markets for information regarding local businesses and advertising are intensely competitive and rapidly changing, and we expect competition to intensify further in the future with the emergence of new technologies and market entrants. We compete for consumer traffic with traditional, offline business guides and directories as well as online providers of local and web search. We also compete for a share of businesses’ overall advertising budgets with traditional, offline media companies and other Internet marketing providers.
Our competitors may enjoy competitive advantages, such as greater name recognition, longer operating histories, substantially greater market share, large existing user bases and substantially greater financial, technical and other resources. These companies may use these advantages to offer products similar to ours at a lower price, develop different products to compete with our current solutions and respond more quickly and effectively than we do to new or changing opportunities, technologies, standards or client requirements. In particular, major Internet companies, such as Google, Facebook, Amazon and Microsoft, may be more successful than us in developing and marketing online advertising offerings directly to local businesses, and may leverage their relationships based on other products or services to gain additional share of advertising budgets.
Certain competitors could, also use strong or dominant positions in one or more markets to gain competitive advantage against us in areas in which we operate, including by:
integrating review platforms or features into products they control, such as search engines, web browsers or mobile device operating systems;
making acquisitions;
changing their unpaid search result rankings to promote their own products;
refusing to enter into or renew licenses on which we depend;
limiting or denying our access to advertising measurement or delivery systems;
limiting our ability to target or measure the effectiveness of ads; or
making access to our platform more difficult.

These risks may be exacerbated by the trend in recent years toward consolidation among online media companies, potentially allowing our larger competitors to offer bundled or integrated products that feature alternatives to our platform.

To compete effectively, we must continue to invest significant resources in product development to enhance user experience and engagement, as well as sales and marketing to expand our base of advertisers. However, there can be no assurance that we will be able to compete successfully for users and advertisers against existing or new competitors, and failure to do so could result in loss of existing users, reduced revenue, increased marketing expenses or diminished brand strength, any of which could harm our business.
We rely on third-party service providers and strategic partners for many aspects of our business, and any failure to maintain these relationships could harm our business.
We rely on relationships with various third parties to grow our business, including strategic partners and technology and content providers. For example, we rely on third parties for data about local businesses, mapping functionality, payment processing and administrative software solutions. We also rely on partnership integrations for various transactions available through Yelp, including Grubhub for food-ordering services. Identifying, negotiating and maintaining relationships with third parties require significant time and resources, as does integrating their data, services and technologies onto our platform. The integration of the remainder of Grubhub's restaurant network onto Yelp, in particular, may require significant time, resources and expense, and may divert the attention of our management and employees from other aspects of our business operations. Any delays in completing the Grubhub partnership integration may increase the amount of resources we devote to it, which could adversely affect our business. Once integrated, there can be no assurance that we will be able to realize the intended benefits of the Grubhub partnership.
It is possible that these third-party providers and strategic partners may not be able to devote the resources we expect to the relationships. We may also have competing interests and obligations with respect to our partners in particular, which may make it difficult to maintain, grow or maximize the benefit for each partnership. For example, our entry into the online reservations space with our acquisition of SeatMe, Inc. in 2013 put us in competition with OpenTable, which led to the end of our partnership with OpenTable in 2015. Our focus on integrating additional partners to expand our transaction capabilities may exacerbate this risk. If our relationships with our partners and providers deteriorate, we could suffer increased costs and delays in our ability to provide consumers and advertisers with content or similar services. We have had, and mayprevent it. In some cases, particularly in the future have, disagreements or disputes with our partners about our respective contractual obligations, which could result in legal proceedings or negatively affect our brand and reputation.
In addition, we exercise limited control over our third-party partners and vendors, which makes us vulnerable to any errors, interruptions or delays in their operations. If thesecase of third parties experience any service disruptions, financial distress or other business disruption, or difficulties meetingoperating outside of the United States, our requirements or standards, it could make it difficult foravailable remedies may be inadequate to protect us to operate some aspects of our business. For example, we rely on a single supplier to process payments of all transactions made through Yelp and for purchases of Yelp Deals and Gift Certificates. Any disruption or problems with this supplier or its services could have an adverse effect on our reputation, results of operations and financial results. Similarly, upon expiration or termination of any of our agreements with third-party providers, we may not be able to replace the services provided to us in a timely manner or on terms that are favorable to us, if at all, and a transition from one partner or provider to another could subject us to operational delays and inefficiencies.against such conduct.

We may acquire or invest in other companies or technologies or sell existing business lines or technologies, which could divert our management’s attention, result in additional dilution to our stockholders and otherwise disrupt our operations and harm our operating results. We may also be unable to realize the expected benefits and synergies of any acquisitions or dispositions.investments.
Our success will depend, in part, on our ability to expand our product offerings and grow our business in response to changing technologies, user and advertiser demands and competitive pressures. In some circumstances, we may determine to do so through the acquisition of complementary businesses or technologies rather than through internal development. For example, in February 2017, we acquired Nowait to obtain waitlist system and seating tool technology and in April 2017, we acquired Turnstyle to obtain a wifi-based marketing tool for customer retention and loyalty. Similarly, we may pursue business strategies that include the sale of one or moreinvestments in privately held companies in furtherance of our existing business lines or technologies,strategic objectives, as we did with our saleinvestment in Nowait prior to our acquisition of Eat24 to Grubhub in connection with establishing a long-term partnership with Grubhub.that company. We have limited experience as a company in the complex processes of acquiring and sellinginvesting in businesses and technologies. The pursuit of potential future acquisitions or salesinvestments may divert the attention of management and cause us to incur expenses in identifying, investigating and pursuing transactions, whether or not they are consummated.
Acquisitions that are consummated could result in dilutive issuances of equity securities or the incurrence of debt, which could adversely affect our results of operations. The incurrence of debt in particular could result in increased fixed obligations or include covenants or other restrictions that would impede our ability to manage our operations. In addition, any transactions
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we announce could be viewed negatively by users, businesses or investors. We may also fail to accurately forecast the financial impact of a transaction, including tax and accounting charges.

We may also discover liabilities or deficiencies associated with the companies or assets we acquire or invest in that we did not identify in advance, which may result in significant unanticipated costs.costs or losses. For example, in 2015, two lawsuits were filed against us by former Eat24 employees alleging that Eat24 failed to comply with certain labor laws prior to the acquisition. The effectiveness of our due diligence review and our ability to evaluate the results of such due diligence are dependent upon the accuracy and completeness of statements and disclosures made by the companies we acquire or their representatives, as well as the limited amount of time in which acquisitions are executed. In the case of any business or assets that we sell, the buyer may identify liabilities or deficiencies that were previously unknown to us. We may be obligated to indemnify the buyer for such liabilities or deficiencies, which may result in unanticipated costs that significantly reduce the purchase price we receive for the business or assets. For example, we agreed to indemnify Grubhub and certain related parties against certain losses arising out of Grubhub's purchase of Eat24, including, but not limited to, any breach or inaccuracy of any representation or warranty made by us or Eat24 in the purchase agreement. While Grubhub's right to recover for many claims is limited to the portion of the purchase price being held in escrow, certain claims are only capped at the total purchase price.
In order to realize the expected benefits and synergies of any transactionacquisition that is consummated, we must meet a number of significant challenges that may create unforeseen operating difficulties and expenditures, including:
integrating operations, strategies, services, sites and technologies of an acquired company;
managing the post-transaction business effectively;
retaining and assimilating the employees of an acquired company;
retaining our remaining employees following the disposition of a business;
retaining existing customers and strategic partners, and minimizing disruption to existing relationships, as a result of any integration of new personnel or departure of existing personnel;
difficulties in the assimilation of corporate cultures;
implementing and retaining uniform standards, controls, procedures, policies and information systems; and
addressing risks related to the business of an acquired company that may continue to impact the business following the acquisition.

Any inability to integrate services, sites and technologies, operations or personnel in the case of an acquisition, or to transfer or transition services, sites and technologies, operations or personnel in the case of a disposition, in an efficient and timely manner could harm our results of operations. Transition activities for both acquisitions and dispositions are complex and require significant time and resources, and we may not manage the process successfully, particularly if we are managing multiple integrations or transitionstransactions concurrently. For example, we agreed to provide Grubhub with transition services following the closing of our sale of Eat24, which will require resources and management attention that would otherwise be available for other aspects of our business operations; if we do not provide these services at the level or on the timing agreed upon, we may be liable to Grubhub.
Our ability to integrate complex acquisitions is unproven, particularly with respect to companies that have significant operations or that develop products with which we do not have prior experience. We expect to invest resources to support any future acquisitions, which will result in ongoing operating expenses and may divert resources and management attention from other areas of our business. We cannot assure you that these investments will be successful. Even if we are able to integrate the operations of any acquired company or transfer the operations of any business we sell successfully, we may not realize the full benefits of synergies, cost savings, innovation and operational efficiencies that may be possible from the transaction, or we may not achieve these benefits within a reasonable period of time.
Similarly, investments in private companies are inherently risky in that such companies are typically at an early stage of development, may have no or limited revenues, may not be or may never become profitable, may not be able to secure additional funding or their technologies, services or products may not be successfully developed or introduced into the market. The success of any such investment is typically dependent on a liquidity event, such as a public offering or acquisition. If any company in which we invest decreases in value, we could lose all or part of our investment. These risks would be heightened to the extent any such investment is a minority investment in which we have limited management or operational control over the business.

Our business depends on a strong brand,brand. Maintaining, protecting and any failure to maintain, protect and enhanceenhancing our brand would hurtrequires significant resources and our abilityefforts to retain and expand our base of users and advertisers, as well as our ability to increase the frequency with which they use our products.do so may not be successful.
We have developed a strong brand that we believe has contributed significantly to the success of our business. Maintaining, protecting and enhancing the “Yelp” brand are critical to expanding our base of users and advertisers and increasing the frequency with which they use our solutions. If we fail to maintain and enhance our brand successfully, or if we incur excessive expenses in this effort, our business and financial results may be adversely affected.
Our ability to do so will depend largely on our ability to maintain business owner and consumer trust in the integrity of our products and in the quality and integrity of the user content and other information found on our platform, which we may not do successfully.
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We dedicate significant resources to these goals, including through business owner outreach and education, our automated recommendation software, our consumer alerts program and our efforts to remove content from our platform that violates our terms of service.

Despite these efforts, we cannot guarantee that each of the 106.1 million reviews onmay fail to respond to user or business owner concerns expeditiously or in a manner they perceive to be appropriate, which could erode confidence in our platform that had been recommended and that had not been removed as of December 31, 2017 is useful or reliable, or that consumers will trust the integrity of our content.brand. For example, if our recommendation software does not recommend helpful content or recommends unhelpful content, consumers and businesses alike may stop or reduce their use of our platform and products. Somesome consumers and businesses have alternately expressed concern that our technology either recommends too many reviews, thereby recommending some reviews that may not be legitimate, or too few reviews, thereby not recommending some reviews that may be legitimate. If consumers do not believe our recommended reviews to be useful and reliable, they may seek other services to obtain the information for which they are looking, and may not return to our platform as often in the future, or at all. This would negatively impact our ability to retain and attract users and advertisers and the frequency with which they use our platform.
Moreover, theThe actions of our partners, over whom we have limited, if any, control, may also affect the perceived integrity of our brand if users or advertisers do not have a positive experience transactinginteracting with or through them. In addition, our partnership integrations. If others misuse our brand or pass themselves off as being endorsed or affiliated with us, it could harm our reputation and our business could suffer. For example, we have encountered instances of reputation management companies falsely representing themselves as being affiliated with us when soliciting customers; this practice could be contributing to rumors that business owners can pay to manipulate reviews, rankings and ratings. Our website and mobile app also serve as a platform for expression by our users, and third parties or the public at large may also attribute the political or other sentiments expressed by users on our platform to us, which could harm our reputation.
In addition, negativeNegative publicity about our company, including our technology, sales practices, personnel, customer service, litigation, strategic plans or political activities, could also diminish confidence in our brand and the use of our products. Certain media outlets have previously reported allegations that we manipulate our reviews, rankings and ratings in favor of our advertisers and against non-advertisers. Although we have taken action to combat this perception, our reputation and brand, and our traffic and business in turn, may suffer if negative publicity about our company persists or if users otherwise perceive that our content is manipulated or biased. Allegations and complaints regarding our business practices, and any resulting negative publicity, may also result in increased regulatory scrutiny of our company. In addition to requiring management time and attention, any regulatory inquiry or investigation could itself result in further negative publicity regardless of its merit or outcome.
Maintaining and enhancing our brand mayTrademarks are also require us to make substantial investments, and these investments may not be successful. For example, our trademarks are an important element of our brand.brand and require substantial investments to maintain, which may not be successful. We have faced in the past, and may face in the future, oppositions from third parties to our applications to register key trademarks. If we are unsuccessful in defending against these oppositions, our trademark applications may be denied. Whether or not our trademark applications are denied, third parties may claim that our trademarks infringe their rights. As a result, we could be forced to pay significant settlement costs or cease the use of these trademarks and associated elements of our brand. Doing so could harm our brand recognition and adversely affect our business. IfConversely, if we failare unable to maintain and enhanceprevent others from misusing our brand successfully, or if we incur excessive expenses in this effort,passing themselves off as being endorsed or affiliated with us, it could harm our reputation and our business could suffer. For example, we have encountered instances of reputation management companies falsely representing themselves as being affiliated with us when soliciting customers; this practice could be contributing to the perception that business owners can pay to manipulate reviews, rankings and financial results may be adversely affected.ratings.

If we fail to manage our growthemployee operations and organization effectively, our brand, results of operations and business could be harmed.
We have experienced rapid growth in our headcountOur employee operations are complex and operations, including through our acquisitions of other businesses, which placesplace substantial demands on management and our operational infrastructure. Most of our employees have been with us for fewer than two years; to manage the expectedexecute on our growth of our operations,strategy, we will need to continue to increase the productivity of our current employees and hire, train and manage new employees. In particular, we intend to continue to make substantial investments in our engineering, organization as well as our sales and marketing organizations. As a result, we must effectively integrate, develop and motivate a large number of new employees including employees from any acquired businesses, while maintaining the beneficial aspects of our company culture.

As our business matures, we make periodic changes and adjustments to our organization in response to various internal and external considerations, including market opportunities, the competitive landscape, new and enhanced products, acquisitions, sales performance, increases in headcountavailability of employee talent and cost levels.costs. In some instances, these changes have resulted in a temporary lack of focus and reduced productivity, which may occur again in connection with any future changes to our organization and may negatively affect our results of operations. For example, it may take time for our sales, customer success and otherIf these organizations are unable to adapt quickly and effectively to selling and supporting advertising contracts with flexible cancellation terms, whichchanges or adjustments to our organization, our business will be harmed. Similarly, we are increasingly offering. Similarly, any significantfocused on achieving greater cost-effectiveness in our advertising business; while we plan to continue investing in our direct sales force, we also plan to emphasize other, more efficient sales channels, such as multi-location and self-serve, and may otherwise pursue new strategies for high-margin revenue growth, such as investing in our direct sales force in different, lower-cost markets than where we historically had large sales presences. These and other changes toin our sales organization, sales force hiring priorities or in the way we structure compensation of our sales organization may be disruptive and may affect our ability to generate revenue.

Our employee operations may also be negatively affected by a range of external factors that are not within our control. For example, if catastrophic events, such as earthquakes or fires, or public health issues, such as the recent COVID-19 coronavirus outbreak, have a substantial impact on employee attendance or productivity, our results of operations may be harmed. The extent and duration of impacts from such events are typically uncertain; the duration and extent of the impact from the coronavirus outbreak, for example, depends on future developments that cannot be accurately predicted at this time, such as the severity and transmission rate of the virus, the extent and effectiveness of containment actions and the impact of these and other
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factors on our employees. If we are not able to respond to and manage the impact of such events effectively, our business will be harmed.

To manageexecute on our growth strategy, we may need to improve our operational, financial and management systems and processes, which may require significant capital expenditures and allocation of valuable management and employee resources, as well as subject us to the risk of over-expanding our operating infrastructure. For example, it can be difficult to train thousands of sales employees across multiple offices according to the same business standards, practices and laws, and we have been the subject of lawsuits

alleging that we have failed to do so. For example, we arewere the subject of a putative class action lawsuit alleging that our sales force does not properly disclose that calls may be monitored or recorded for quality assurance. However, ifIf we fail to scale our operations successfully and increase productivity, the quality of our platform and efficiency of our operations could suffer, which could harm our brand, results of operations and business.

We make theare committed to providing a great consumer experience, our highest priority. Our dedication to making decisions based primarily on the best interests of consumerswhich may cause us to forgo short-term gains and advertising revenue.
We base many of our decisions on the best interests ofour commitment to providing the consumers who use our platform.platform with a great experience. In the past, we have forgone, and we may in the future forgo, certain expansion or revenue opportunities that we do not believe are inexcessively degrade the best interests of consumers,consumer experience, even if such decisions negatively impact our results of operations in the short term. For example, we phased out our brand advertising products in part because demand in the brand advertising market has shifted toward products disruptive to the consumer experience, such as video ads. Our approach of puttingexperience. Any decisions we make that prioritize consumers first may negatively impact our relationship with existing or prospective advertisers. For example, unless we believe that a review violates our terms of service, such as reviews that contain hate speech or bigotry, we will allow the review to remain on our platform, even if the business disputes its accuracy. Certain advertisers may therefore perceive us as an impediment to their success as a result of negative reviews and ratings. This practice could result in a loss of advertisers, which in turn could harm our results of operations. However, we believe that this approach has been essential to our success in attracting users and increasing the frequency with which they use our platform. As a result, we believe this approach has served the long-term interests of our company and our stockholders and will continue to do so in the future.

We rely on the performance of highly skilled personnel, and if we are unable to attract, retain and motivate well-qualified employees, our business could be harmed.
We believe our success has depended, and continues to depend, on the efforts and talents of our employees, including our senior management team, software engineers, marketing professionals and advertising sales staff. All of our officers and other U.S. employees are at-will employees, which means they may terminate their employment relationship with us at any time, and their knowledge of our business and industry would be extremely difficult to replace. Any changes in our senior management team in particular, even in the ordinary course of business, may be disruptive to our business. For example, our former Chief Financial Officer left the Company in the third quarter of 2019, and we recently hired a new Chief Financial Officer. While we seek to manage these transitions carefully, including by establishing strong processes and procedures and succession planning, such changes may result in a loss of institutional knowledge and cause disruptions to our business. If our senior management team fails to work together effectively or execute our plans and strategies on a timely basis as a result of management turnover or otherwise, our business could be harmed.

Our future also depends on our continuing ability to attract, develop, motivate and retain highly qualified and skilled employees. Qualified individuals are in high demand and we expect to continue to face significant competition from other companies in hiring such personnel, particularly in the San Francisco Bay Area, where our headquarters is located and where the cost of living is high. Identifying, recruiting, training and integrating new hires will require significant time, expense and attention; as a result, we may incur significant costs to attract them before we can validate their productivity. As we continue to mature, the incentives to attract, retain and motivate employees provided by our equity awards may not be as effective as in the past, and if we issue significant equity to attract additional employees or to retain our existing employees, we would incur substantial additional stock-based compensation expense and the ownership of our existing stockholders would be further diluted. Volatility in the price of our common stock may also make it more difficult or costly in the future to use equity compensation to motivate, incentivize and retain our employees. If we fail to manage our hiring needs effectively, our efficiency and ability to meet our forecasts, as well as employee morale, productivity and retention, could suffer, and our business and operating results could be adversely affected.


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Risks Related to Our Technology and Intellectual Property

Our business is dependent on the uninterrupted and proper operation of our technology and network infrastructure. Any significant disruption in our service could damage our reputation, result in a potential loss of users and engagement and adversely affect our results of operations.
It is important to our success that users in all geographies be able to access our platform at all times. If our platform is unavailable when users attempt to access it or it does not load as quickly as they expect, users may seek other services to obtain the information for which they are looking, and may not return to our platform as often in the future, or at all. This would negatively impact our ability to attract users and advertisers and increase the frequency with which they use our platform.
We have previously experienced, and may experience in the future, service disruptions, outages and other performance problems. Such performance problems may be due to a variety of factors, including those set forth below; however, in some instances, we may not be able to identify the cause or causes of these performance problems within an acceptable period of time.
Infrastructure Changes and Capacity Constraints.Constraints. We may experience capacity constraints due to an overwhelming number of users accessing our platform simultaneously. It may become increasingly difficult to maintain and improve

the availability of our platform, especially during peak usage times, as our products become more complex and our traffic increases.

Human or Software Errors.Errors. Our products and services are highly technical and complex, and may contain errors or vulnerabilities that could result in unanticipated downtime for our platform. Users may also use our products in unanticipated ways that may cause a disruption in service for other users attempting to access our platform. We may encounter such difficulties more frequently as we acquire companies and incorporate their technologies into our service.

Catastrophic Occurrences.Occurrences. Our systems are vulnerable to damage or interruption from earthquakes, fires, floods, power losses, telecommunications failures, terrorist attacks and similar events. Our U.S. corporate offices and one of the facilities we lease to house our computer and telecommunications equipment are located in the San Francisco Bay Area, a region known for seismic activity. Acts of terrorism, which may be targeted at metropolitan areas that have higher population densities than rural areas, could cause disruptions in our or our advertisers’ businesses or the economy as a whole.

We may not have sufficient protection or recovery plans in certain circumstances, such as natural disasters affecting the San Francisco Bay Area, and our business interruption insurance may be insufficient to compensate us for losses that may occur. Our disaster recovery program contemplates transitioning our platform and data to a backup center in the event of a catastrophe. Although this program is functional, if our primary data center shuts down, there will be a period of time that our services will remain shut down while the transition to the back-up data center takes place. During this time, our platform may be unavailable in whole or in part to our users.
We expect to continue to make significant investments to maintain and improve the availability of our platform and to enable rapid releases of new features and products. To the extent that we do not effectively address capacity constraints, upgrade our systems as needed and continually develop our technology and network architecture to accommodate actual and anticipated changes in technology in a cost-effective manner, while at the same time maintaining the reliability and integrity of our systems and infrastructure, our business and operating results may be harmed.

If our security measures are compromised, or if our platform is subject to attacks that degrade or deny the ability of users to access our content, users may curtail or stop use of our platform.
Our industry is prone to cyber-attacks by third parties seeking unauthorized access to our data or users’ data, or to disrupt our ability to provide our services. Any failure to prevent or mitigate security breaches could expose us to the risk of loss or misuse of private user and business information, which could result in potential liability and litigation. We may be a particularly compelling target for such attacks as a result of our brand recognition.
Computer viruses, break-ins, malware, social engineering (particularly spear phishing attacks), attempts to overload servers with denial-of-service or other attacks and similar disruptions from unauthorized use of computer systems have become more prevalent in our industry, have occurred on our systems in the past and are expected to occur periodically on our systems in the future. User and business owner accounts and listing pages could also be hacked, hijacked, altered or otherwise claimed or controlled by unauthorized persons. For example, we enable businesses to create free online accounts and claim the business
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listing pages for each of their business locations. Although we take steps to confirm that the person setting up the account is affiliated with the business, our verification systems could fail to confirm that such person is an authorized representative of the business, or mistakenly allow an unauthorized person to claim the business’s listing page. In addition, we face risks associated with security breaches affecting our third-party partners and service providers. A security breach at any such third party could be perceived by consumers as a security breach of our systems and result in negative publicity, damage to our reputation and expose us to other losses.
Cyber-attacks continue to evolve in sophistication and volume, and inherently may be inherently difficult to detect for long periods of time. Although we have developed systems and processes that are designed to protect our data and prevent data loss and other security breaches, the techniques used to obtain unauthorized access, disable or degrade service or sabotage systems change frequently, often are not recognized until launched against a target or long after, and may originate from less regulated and more remote areas around the world. As a result, these preventative measures may not be adequate and we cannot assure you that they will provide absolute security. Although none of the disruptions we have experienced to date have had a material effect on our business, any future disruptions could lead to interruptions, delays or website shutdowns, causing loss of critical data or the unauthorized disclosure or use of personally identifiable or other confidential information. Even if we experience no significant shutdown or no critical data is lost, obtained or misused in connection with an attack, the occurrence of such attack or the perception that we are vulnerable to such attacks may harm our reputation.reputation, degrade the user experience, cause loss of confidence in our products or result in financial harm to us.
Any or all of these issues could negatively impact our ability to attract new users, deter current users from returning to our platform, cause existing or potential advertisers to cancel their contracts or subject us to third-party lawsuits or other liabilities. For example, we work with a third-party vendor to process credit card payments by users and businesses, and are subject to payment

card association operating rules. Compliance with applicable operating rules, however, will not necessarily prevent illegal or improper use of our payment systems, or the theft, loss or misuse of payment information, however.information. If our security measures fail to prevent fraudulent credit card transactions and protect payment information adequately as a result of employee error, malfeasance or otherwise, or we fail to comply with the applicable operating rules, we could be liable to the users and businesses for their losses, as well as the vendor under our agreement with it, and be subject to fines and higher transaction fees. In addition, government authorities could also initiate legal or regulatory actions against us in connection with such incidents, which could cause us to incur significant expense and liability or result in orders or consent decrees forcing us to modify our business practices.

Some of our products contain open source software, which may pose particular risks to our proprietary software and solutions.
We have used open source software in our products and will use open source software in the future. From time to time, we may face claims from third parties claiming ownership of, or demanding release of, the open source software or derivative works that we developed using such software (which could include our proprietary source code), or otherwise seeking to enforce the terms of the applicable open source license. These claims could result in litigation and could require us to purchase a costly license or cease offering the implicated solutions unless and until we can re-engineer them to avoid infringement. This re-engineering process could require significant additional research and development resources. In addition to risks related to license requirements, use of certain open source software can lead to greater risks than use of third-party commercial software because open source licensors generally do not provide warranties or controls on the origin of the software. Any of these risks could be difficult to eliminate or manage, and, if not addressed, could have a negative effect on our business and operating results.

Failure to protect or enforce our intellectual property rights could harm our business and results of operations.
We regard the protection of our trade secrets, copyrights, trademarks, patent rights and domain names as critical to our success. In particular, we must maintain, protect and enhance the “Yelp”"Yelp" brand. We strive to protect our intellectual property rights by relying on federal, state and common law rights, as well as contractual restrictions. We pursue the registration of our domain names, trademarks and service marks in the United States and in certain jurisdictions abroad. While we are pursuing a number of patent applications, we currently have only limited patent protection for our core business, which may make it more difficult to assert certain of our intellectual property rights. We strive to protect our intellectual property rights by relying on federal, state and common law rights, as well as contractual restrictions. We typically enter into confidentiality and invention assignment agreements with our employees and contractors, as well as confidentiality agreements with parties with whom we conduct business in order to limit access to, and disclosure and use of, our proprietary information. However, these contractual arrangements and the other steps we have taken to protect our intellectual property may not prevent the misappropriation or disclosure of our proprietary information or deter independent development of similar technologies by others.others, which may diminish the value of our brand and other intangible assets and allow competitors to more effectively mimic our products and services.
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Effective trade secret, copyright, trademark, patent and domain name protection is expensive to develop and maintain, both in terms of initial and ongoing registration requirements and expenses and the costs of defending our rights. Seeking protection for our intellectual property, including trademarks and domain names, is an expensive process and may not be successful, and we may not do so in every location in which we operate. Similarly, the process of obtaining patent protection is expensive and time consuming, and we may not be able to prosecute all necessary or desirable patent applications at a reasonable cost or in a timely manner. Even if issued, there can be no assurance that these patents will adequately protect our intellectual property, as the legal standards relating to the validity, enforceability and scope of protection of patent and other intellectual property rights are uncertain. Litigation may become necessary to enforce our patent or other intellectual property rights, protect our trade secrets or determine the validity and scope of proprietary rights claimed by others. For example, we may incur significant costs in enforcing our trademarks against those who attempt to imitate our “Yelp”"Yelp" brand. Any litigation of this nature, regardless of outcome or merit, could result in substantial costs and diversion of management and technical resources, any of which could adversely affect our business and operating results.

We may be unable to continue to use the domain names that we use in our business, or prevent third parties from acquiring and using domain names that infringe on, are similar to, or otherwise decrease the value of our brand or our trademarks or service marks.
We have registered domain names for the websites that we use in our business, such as Yelp.com. If we lose the ability to use a domain name, whether due to trademark claims, failure to renew the applicable registration or any other cause, we may be forced to market our products under a new domain name, which could cause us substantial harm or cause us to incur significant expense in order to purchase rights to the domain name in question. In addition, our competitors and others could attempt to capitalize on our brand recognition by using domain names similar to ours. Domain names similar to ours have been registered by others in the United States and elsewhere. We may be unable to prevent third parties from acquiring and using domain names that infringe on, are similar to or otherwise decrease the value of our brand or our trademarks or service marks. Protecting and enforcing our rights in our domain names may require litigation, which could result in substantial costs and diversion of management’s attention.


Risks Related to Our Financial Statements and Tax Matters

We have incurred significant operating losses in the past, and we may not be able to generate sufficient revenue to maintain profitability. Our recent growth rate will likely not be sustainable, and a failure to maintain an adequate growth rate will adversely affect our business and results of operations.
You should not rely on the revenue growth of any prior quarterly or annual period, or the net income we realize from time to time, as an indication of our future performance. Although our revenues have grown rapidly in the last several years, increasing from $12.1 million in 2008 to $846.8 million$1.0 billion in 2017,2019, our revenue growth rate has declined in recent periods as a result of a variety of factors, including the maturation of our business and the gradual decline in the number of major geographic markets within the United States and Canada to which we have not already expanded. While Moreover, our decisionstrategy to focusgrow our salesbusiness involves significant risks and marketing resources primarilyexecuting on the United States and Canadait may result in some cost savings, it also limits the markets from whichprove more difficult than we generate revenue and our ability to expand internationally in the future. Similarly, we expect our sale of Eat24 will result in some cost savings, but will also result in a substantial reduction in our revenue, which will not be fully offset by revenue from our Grubhub partnership. We cannot predict the impact of these plans on our long-term prospects or the impact that fully outsourcing food ordering on our platform may have on our brand and reputation.currently anticipate.
Historically, our costs have increased each year and we expect our costs to increase in future periods as we continue to expend substantial financial resources on:
sales and marketing;
our technology infrastructure;
product and feature development;
sales and marketing;
our technology infrastructure;
market development efforts;
strategic opportunities, including commercial relationships and acquisitions;
our stock repurchase program; and
general administration, including legal and accounting expenses related to being a public company.

These investments may not result in increased revenue or growth in our business. Our costs may also increase as we hire additional employees, particularly as a result of the significant competition that we face to attract and retain technical talent.
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Our expenses may grow faster than our revenue and may be greater than we anticipate in a particular period or over time. If we are unable to maintain adequate revenue growth and to manage our expenses, we may continue to incur significant losses in the future and may not be able to maintain profitability.

We have a limited operating history in an evolving industry, which makes it difficult to evaluate our future prospects and may increase the risk that we will not be successful.
We have a limited operating history at the current scale of our business in an evolving industry that may not develop as expected, if at all. As a result, our historical operating results may not be indicative of our future operating results, making it difficult to assess our future prospects. You should consider our business and prospects in light of the risks and difficulties we may encounter in this rapidly evolving industry, which we may not be able to address successfully. These risks and difficulties include numerous factors, many of which we are unable to predict or are outside of our control, such as our ability to, among other things:
increase the number of users of our website and mobile app and the number of reviews and other content on our platform;
attract and retain new advertising clients, many of which may have limited or no online advertising experience, which may become more difficult as an increasing portion of our advertisers have the ability to cancel their advertising plans at any time;
increase the number of users of our website and mobile app and the number of reviews and other content on our platform;
forecast revenue and adjusted EBITDA accurately, which is made more difficult by the large percentage of our revenue derived from performance-based CPC advertising and the flexible cancellation terms we are increasingly offering,increasing portion of our advertiser base with non-term contracts, as well as appropriately estimate and plan our expenses;
continue to earn and preserve a reputation for providing meaningful and reliable reviews of local businesses;
effectively adapt our products and services to mobile and other alternative devices as usage of such devices continues to increase;
successfully compete with existing and future providers of other forms of offline and online advertising;advertising;

successfully compete with other companies that are currently in, or may in the future enter, the business of providing information regarding local businesses;
successfully manage our growth;
successfully develop and deploy new features and products;products;
manage and integrate successfully any acquisitions of businesses, solutions or technologies;technologies;
avoid interruptions or disruptions in our service or slower than expected load times;times;
develop a scalable, high-performance technology infrastructure that can efficiently and reliably handle increased usage, as well as the deployment of new features and products;
hire, integrate and retain talented sales and other personnel;personnel;
effectively manage rapid growth in our sales force, other personnelcomplex employee operations and operations;organization; and
effectively identify, engage and manage third-party partners and service providers.

providers
.
If the demand for information regardingconnecting consumers and local businesses does not develop as we expect, or if we fail to address the needs of this demand, our business will be harmed. We may not be able to address successfully these risks and difficulties or others, including those described elsewhere in these risk factors. Failure to address these risks and difficulties adequately could harm our business and cause our operating results to suffer.

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We expect a number of factors to cause our operating results to fluctuate on a quarterly and annual basis, which may make it difficult to predict our future performance.
Our operating results could vary significantly from period to period as a result of a variety of factors, many of which may be outside of our control. This volatility increases the difficulty in predicting our future performance and means comparing our operating results on a period-to-period basis may not be meaningful. In addition to the other risk factors discussed in this section, factors that may contribute to the volatility of our operating results include:
changes in the products we offer, such as our sale of Eat24 and the related long-term partnership with Grubhub;transition to selling our local advertising products pursuant to non-term contracts;
changes or updates to our business strategies;
changes in our pricing policies and terms of contracts, whether initiated by us or as a result of competition;
changes in the markets in which we operate, such as the wind down of our international sales and marketing operations to focus on our core markets of the United States and Canada;
cyclicality and seasonality, which has become more pronounced since we transitioned to non-term contracts and may become morefurther pronounced as our growth rate slows;
the effects of changes in search engine placement and prominence;
the adoption of any laws or regulations that adversely affect the growth, popularity or use of the Internet, such as the repeal of Internet neutrality regulations in the United States;
the success of our sales and marketing efforts;
adverse litigation judgments, settlements or other litigation-related costs, including the costs associated with investigating and defending intellectual property infringement and other claims and related judgments or settlements;claims;
interruptions in service and any related impact on our reputation;
changes in advertiser budgets or the market acceptance of online advertising solutions;
changes in consumer behavior with respect to local businesses;
changes in our tax rates or exposure to additional tax liabilities, including as a result of the U.S. Tax Cuts and Jobs Act;
the impact of macroeconomic conditions, including the resulting effect on consumer spending at local businesses and the level of advertising spending by local businesses;
new accounting pronouncements or changes in existing accounting standards and practices, such as our adoption on January 1, 2018 of Accounting Standards Update 2014-09, “Revenue from Contracts with Customers” (refer to Note 2 of our consolidated financial statements for additional information on the new guidancepractices; and its impact on us); and
the effects of natural or man-made catastrophic events.

Because we recognize mostThe impact of the revenue fromthese and other factors on our local advertising products over the term of an agreement, a significant downturn in our businessresults may notoccur earlier and be immediately reflected in our results of operations.

We recognize revenue from sales of our advertising products over the terms of the applicable agreements. Although our advertising contracts increasingly provide flexible cancellation terms, we still offer contracts for three-, six- and 12-month terms. As a result, a significant portion of the revenue we report in each quarter is generated from agreements entered into during previous quarters. Consequently, a decline in new or renewed agreements in any one quarter may not significantly impact our revenue in that quarter but will negatively affect our revenue in future quarters. In addition, we may be unable to adjust our fixed costs in response to reduced revenue. Accordingly, the effect of significant declines in advertising sales may not be reflected in our short-term results of operations.
If our goodwill or intangible assets become impaired, we may be required to record a significant chargemore concentrated going forward than prior to our income statement.
We have recorded a significant amount of goodwill relatedtransition to our acquisitions to date, and a significant portion of the purchase price of any companies we acquire in the future may be allocated to acquired goodwill and other intangible assets. Under accounting principles generally accepted in the United States ("GAAP"), we review our intangible assets for impairment when events or changes in circumstances indicate the carrying value of our goodwill and other intangible assets may not be recoverable. Goodwill is required to be tested for impairment at least annually. Factors that may be considered include declines in our stock price, market capitalization and future cash flow projections. If our acquisitions do not yield expected returns, our stock price declines or any other adverse change in market conditions occurs, a changenon-term contracts, due to the estimationincreasing proportion of fair value could result. Any such change could result in an impairment charge to our goodwill and intangible assets, particularly if such change impacts any of our critical assumptions or estimates, and may have a negative impact on our financial position and operating results.
We may require additional capital to support business growth, and such capital might not be available on acceptable terms, if at all.
We intend to continue to invest in our business and may require or otherwise seek additional funds to respond to business challenges, including the need to develop new features and products, enhance our existing services, improve our operating infrastructure and acquire complementary businesses and technologies. In addition, in July 2017, our board of directors authorized the repurchase of up to $200 million of our common stock and, in 2018, we began settling employee tax liabilities associatedadvertisers with the vesting of RSUs through net share withholding for our U.S.-based employees, which will require us to cover such taxes with cash from our balance sheet. As a result, we may need to engage in equity or debt financings to secure additional funds. If we raise additional funds through future issuances of equity or convertible debt securities, our existing stockholders could suffer significant dilution, and any new equity securities we issue could have rights, preferences and privileges superior to those of our common stock. Any future debt financing we secure could involve restrictive covenants relating to our capital raising activities and other financial and operational matters, which may make it more difficult for us to obtain additional capital and to pursue business opportunities, including potential acquisitions. We may not be able to obtain additional financing on terms favorable to us, if at all. If we are unable to obtain adequate financing or financing on terms satisfactory to us when we require it, our ability to continue to support our business growth and respond to business challenges could be significantly impaired, and our business may be harmed.terminate their ad campaigns at any time without penalty.
We may have exposure to greater than anticipated tax liabilities.
Our income tax obligations are based in part on our corporate operating structure and intercompany arrangements, including the manner in which we develop, value and use our intellectual property and the valuations of our intercompany transactions. For example, our corporate structure includes legal entities located in jurisdictions with income tax rates lower than the U.S. statutory tax rate. Our intercompany arrangements allocate income to such entities in accordance with arm’s length principles and commensurate with functions performed, risks assumed and ownership of valuable corporate assets. We believe that income taxed in certain foreign jurisdictions at a lower rate relative to the U.S. statutory rate will have a beneficial impact on our worldwide effective tax rate.
However, significant judgment is required in evaluating our tax positions and determining our provision for income taxes. During the ordinary course of business, there are many transactions and calculations for which the ultimate tax determination is uncertain. For example, our effective tax rates could be adversely affected by earnings being lower than anticipated in countries where we have lower statutory rates and higher than anticipated in countries where we have higher statutory rates, by changes in foreign currency exchange rates or by changes in the relevant tax, accounting and other laws, regulations, principles and interpretations.
In addition, the application of the tax laws of various jurisdictions, including the United States, to our international business activities is subject to interpretation and depends on our ability to operate our business in a manner consistent with our corporate structure and intercompany arrangements. The taxing authorities of jurisdictions in which we operate may challenge our methodologies for valuing developed technology or intercompany arrangements, including our transfer pricing, or determine that

the manner in which we operate our business does not achieve the intended tax consequences, which could increase our worldwide effective tax rate and harm our financial position and results of operations. As we operate in numerous taxing jurisdictions, the application of tax laws can also be subject to diverging and sometimes conflicting interpretations by tax authorities of these jurisdictions. It is not uncommon for taxing authorities in different countries to have conflicting views, for instance, with respect to, among other things, the manner in which the arm’s-length standard is applied for transfer pricing purposes, or with respect to the valuation of intellectual property.
Changes in tax laws or tax rulings, or the examination of our tax positions, could materially affect our financial position and results of operations.
Tax laws are dynamic and subject to change as new laws are passed and new interpretations of the law are issued or applied. Our current practices, existing corporate structure and intercompany arrangements have been implemented in a manner we believe is in compliance with current prevailing tax laws. However, the tax benefits that we intend to eventually derive could be undermined due to changing tax laws or new interpretations of existing laws that are inconsistent with previous interpretations or positions taken by taxing authorities on which we have relied.
In particular, the U.S. Tax Cuts and Jobs Act (the “Tax Act”), which was enacted on December 22, 2017, made broad and complex changes to the U.S. tax code, including, among other things, reducing the federal corporate tax rate. Although we have provisionally concluded that the Tax Act had no net impact on our financial statements for the year ended December 31, 2017, this conclusion may change as a result of changes in interpretations of the Tax Act, any legislative action to address questions that arise under the Tax Act, any changes in accounting standards for income taxes or related interpretations in response to the Tax Act, or any updates or changes to estimates that we used to calculate the impact of the Tax Act. We currently anticipate finalizing and recording any such adjustments no later than December 22, 2018. Please refer to Note 15 in our consolidated financial statements for additional information regarding the Tax Act’s impact on us.
In addition, the taxing authorities in the United States and other jurisdictions where we do business regularly examine our income and other tax returns. The ultimate outcome of these examinations cannot be predicted with certainty. Should the Internal Revenue Service ("IRS") or other taxing authorities assess additional taxes as a result of examinations or changes to applicable law or interpretations of the law, we may be required to record charges to our operations, which could harm our business, operating results and financial condition.
Our business and results of operations may be harmed if we are deemed responsible for the collection and remittance of state sales taxes for food orders placed through our platform.
If we are deemed an agent for the order-enabled restaurants on our platform under state tax law, we may be deemed responsible for collecting and remitting sales taxes directly to certain states. It is possible that one or more states could seek to impose sales, use or other tax collection obligations on us with regard to such food sales. These taxes may be applicable to past sales, including sales completed through Eat24 prior to its sale, for which we may have indemnification obligations to Grubhub. A successful assertion that we should be collecting additional sales, use or other taxes or remitting such taxes directly to states could result in substantial tax liabilities for past sales and additional administrative expenses, which would harm our business and results of operations.
We rely on data from both internal tools and third parties to calculate certain of our performance metrics. Real or perceived inaccuracies in such metrics may harm our reputation and negatively affect our business.
We track certain performance metrics — including the number of unique devices accessing our mobile app in a given period, page viewsactive claimed local business locations, ad clicks and calls and clicks for directions and map viewsCPCs — with internal tools, which are not independently verified by any third party. Our internal tools have a number of limitations and our methodologies for tracking these metrics may change over time, which could result in unexpected changes to our metrics, including key metrics that we report. If the internal tools we use to track these metrics over- or under-count performance or contain algorithm or other technical errors, the data we report may not be accurate and our understanding of certain details of our business may be distorted, which could affect our
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longer-term strategies. For example, in 2018, we discovered a software error that caused our previously reported claimed local business locations metric to be overstated for the third quarter of 2017 through the first quarter of 2018, and have revised them accordingly. Our metrics may also be affected by mobile applications that automatically contact our servers for regular updates with no discernible user action involved; this activity can cause our system to count the device associated with the app as an app unique device in a given period. If the internal toolsAlthough we usetake steps to track theseexclude such activity and, as a result, do not believe it has had a material impact on our reported metrics, over- or under-count performance or contain algorithm or other technical errors, the data we reportour efforts may not be accurate. In addition, limitations or errors with respect to how we measure data may affect our understanding of certain details of our business, which could affect our longer-term strategies.successfully account for all such activity.

In addition, certain of our other key metrics — the number of our desktop unique visitors and mobile website unique visitors — are calculated based on data from third parties. While these numbers are based on what we believe to be reasonable calculations for the applicable periods of measurement, our third-party providers periodically encounter difficulties in providing accurate data for such metrics as a result of a variety of factors, including human and software errors. We expect these challenges to continue

to occur, and potentially to increase as our traffic grows. For example, we have discovered in the past, and expect to discover in the future, that a portionportions of our desktop traffic, as measured by Google Analytics, since the third quarter of 2016 hashave been attributable to a single robot.robots. Because the traffic from this robotrobots does not represent valid consumer traffic, we determined that our reported desktop unique visitorsvisitor metric for impacted periods reflects an adjustment to the third quarterGoogle Analytics measurement of 2016, fourth quarter of 2016 and first quarter of 2017 were overstated, and have adjusted themour traffic to remove traffic identified as originating from robots to provide greater accuracy and transparency. Our reported number of desktop unique visitors for subsequent periods also reflect adjustments to the numbers provided by Google Analytics to account for this robot, and weWe expect to continue to make similar adjustments in the future if we determine that our traffic metrics are materially impacted by robot or other invalid traffic.
There are also inherent challenges in measuring usage across our large user base. For example, because these metrics are based on users with unique cookies, an individual who accesses our website from multiple devices with different cookies may be counted as multiple unique visitors, and multiple individuals who access our website from a shared device with a single cookie may be counted as a single unique visitor. In addition, although we use technology designed to block low-quality traffic, such as robots, spiders and other software, we may not be able to prevent all such traffic, and such technology may have the effect of blocking some valid traffic. For these and other reasons, the calculations of our desktop unique visitors and mobile website unique visitors may not accurately reflect the number of people actually using our platform.
Our measures of traffic and other key metrics may differ from estimates published by third parties (other than those whose data we use to calculate our key metrics) or from similar metrics of our competitors. We are continually seeking to improve our ability to measure these key metrics, and regularly review our processes to assess potential improvements to their accuracy. However, the improvement of our tools and methodologies could cause inconsistency between current data and previously reported data, which could confuse investors or raise questions about the integrity of our data. Similarly, as both the industry in which we operate and our business continue to evolve, so too might the metrics by which we evaluate our business. We may revise or cease reporting metrics if we determine such metrics are no longer accurate or appropriate measures of our performance. For example, we stopped reporting our claimed local business locations metric and instead disclose the number of active claimed local business locations, which we believe provides a better measure of the number of businesses that represent the highest quality leads available to our local sales force than our claimed local business locations metric. We also phased out our paid advertising accounts metric and replaced it with paid advertising locations, which we believe provides a better measurement of our market penetration. If our users, advertisers, partners and stockholders do not perceive our metrics to be accurate representations, or if we discover material inaccuracies in our metrics, our reputation may be harmed.

Because we recognize revenue from a portion of our advertising products over the term of an agreement, a significant downturn in our business may not be immediately reflected in our results of operations.
We recognize revenue from sales of our advertising products over the terms of the applicable agreements. Although an increasing portion of our advertising contracts are non-term contracts, a portion of our customers continue to be subject to contracts with terms. As a result, a significant portion of the revenue we report in each quarter is generated from agreements entered into during previous quarters. Consequently, a decline in new or renewed agreements in any one quarter may not significantly impact our revenue in that quarter but will negatively affect our revenue in future quarters. In addition, we may be unable to adjust our fixed costs in response to reduced revenue. Accordingly, the effect of significant declines in advertising sales may not be reflected in our short-term results of operations.

If our goodwill or intangible assets become impaired, we may be required to record a significant charge to our statements of operations.
We have recorded a significant amount of goodwill related to our acquisitions to date, and a significant portion of the purchase price of any companies we acquire in the future may be allocated to acquired goodwill and other intangible assets. Under GAAP, we review our intangible assets for impairment when events or changes in circumstances indicate the carrying value of our goodwill and other intangible assets may not be recoverable. Goodwill is required to be tested for impairment at least annually. Factors that may be considered include declines in our stock price, market capitalization and future cash flow
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projections. If our acquisitions do not yield expected returns, our stock price declines or any other adverse change in market conditions occurs, a change to the estimation of fair value could result. Any such change could result in an impairment charge to our goodwill and intangible assets, particularly if such change impacts any of our critical assumptions or estimates, and may have a negative impact on our financial position and operating results.

We may require additional capital to support business growth, and such capital might not be available on acceptable terms, if at all.
We intend to continue to invest in our business and may require or otherwise seek additional funds to respond to business challenges, including the need to develop new features and products, enhance our existing services, improve our operating infrastructure and acquire complementary businesses and technologies. In addition, our board of directors has authorized us to repurchase up to $950 million of our common stock since we instituted our stock repurchase program in July 2017 and we currently settle employee tax liabilities associated with the vesting of RSUs through net share withholding, which requires us to cover such taxes with cash from our balance sheet. As a result, we may need to engage in equity or debt financings to secure additional funds. If we raise additional funds through future issuances of equity or convertible debt securities, our existing stockholders could suffer significant dilution, and any new equity securities we issue could have rights, preferences and privileges superior to those of our common stock. Any future debt financing we secure could involve restrictive covenants relating to our capital raising activities and other financial and operational matters, which may make it more difficult for us to obtain additional capital and to pursue business opportunities, including potential acquisitions. We may not be able to obtain additional financing on terms favorable to us, if at all. If we are unable to obtain adequate financing or financing on terms satisfactory to us when we require it, our ability to continue to support our business growth and respond to business challenges could be significantly impaired, and our business may be harmed.

We may have exposure to greater than anticipated tax liabilities.
Our income tax obligations are based in part on our corporate operating structure and intercompany arrangements, including the manner in which we develop, value and use our intellectual property and the valuations of our intercompany transactions. For example, our corporate structure includes legal entities located in jurisdictions with income tax rates lower than the U.S. statutory tax rate. Our intercompany arrangements allocate income to such entities in accordance with arm’s length principles and commensurate with functions performed, risks assumed and ownership of valuable corporate assets. We believe that income taxed in certain foreign jurisdictions at a lower rate relative to the U.S. statutory rate will have a beneficial impact on our worldwide effective tax rate.
However, significant judgment is required in evaluating our tax positions and determining our provision for income taxes. During the ordinary course of business, there are many transactions and calculations for which the ultimate tax determination is uncertain. For example, our effective tax rates could be adversely affected by changes in the valuation of our deferred tax assets and liabilities, or by changes in relevant tax, accounting and other laws, regulations, principles and interpretations.
In addition, the application of the tax laws of various jurisdictions, including the United States, to our international business activities is subject to interpretation and depends on our ability to operate our business in a manner consistent with our corporate structure and intercompany arrangements. The taxing authorities of jurisdictions in which we operate may challenge our methodologies for valuing developed technology or intercompany arrangements, including our transfer pricing, or determine that the manner in which we operate our business does not achieve the intended tax consequences, which could increase our worldwide effective tax rate and harm our financial position and results of operations. As we operate in numerous taxing jurisdictions, the application of tax laws can also be subject to diverging and sometimes conflicting interpretations by tax authorities of these jurisdictions. It is not uncommon for taxing authorities in different countries to have conflicting views, for instance, with respect to, among other things, the manner in which the arm’s-length standard is applied for transfer pricing purposes, or with respect to the valuation of intellectual property.

Changes in tax laws or tax rulings, or the examination of our tax positions, could materially affect our financial position and results of operations.
Tax laws are dynamic and subject to change as new laws are passed and new interpretations of the law are issued or applied. Our current practices, existing corporate structure and intercompany arrangements have been implemented in a manner we believe is in compliance with current prevailing tax laws. However, the tax benefits that we intend to eventually derive could be undermined due to changing tax laws or new interpretations of existing laws that are inconsistent with previous interpretations or positions taken by taxing authorities on which we have relied.
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In particular, the U.S. Tax Cuts and Jobs Act, or the Tax Act, which was enacted on December 22, 2017, made broad and complex changes to the U.S. tax code, including, among other things, reducing the federal corporate tax rate. Although we have concluded that the Tax Act had an immaterial net impact on our financial statements, we expect additional regulatory or accounting guidance from the Financial Accounting Standards Board and the SEC, as well as regulations, interpretations and rulings from federal and state agencies, which could impact our consolidated financial statements.

Some jurisdictions have enacted a tax on technology companies that generate revenues from the provision of digital services, and a number of other jurisdictions are considering enacting similar digital tax regimes. These efforts are alongside the Organization for Economic Co-operation and Development’s ongoing work, as part of its Base Erosion and Profit Shifting (BEPS) Action Plan, to issue a final report in 2020 that provides a long-term, multilateral proposal on taxation of the digital economy and could impact our consolidated financial statements.

In addition, the taxing authorities in the United States and other jurisdictions where we do business regularly examine our income and other tax returns. The ultimate outcome of these examinations cannot be predicted with certainty. Should the Internal Revenue Service or other taxing authorities assess additional taxes as a result of examinations or changes to applicable law or interpretations of the law, we may be required to record charges to our operations, which could harm our business, operating results and financial condition.

Our business and results of operations may be harmed if we are deemed responsible for the collection and remittance of state sales taxes for orders placed through our platform.
If we are deemed an agent for the order-enabled businesses on our platform under state tax law, we may be deemed responsible for collecting and remitting sales taxes directly to certain states. It is possible that one or more states could seek to impose sales, use or other tax collection obligations on us with regard to such sales. These taxes may be applicable to past sales. A successful assertion that we should be collecting additional sales, use or other taxes or remitting such taxes directly to states could result in substantial tax liabilities for past sales and additional administrative expenses, which would harm our business and results of operations.

Risks Related to Regulatory Compliance and Legal Matters

We are, and may be in the future, subject to disputes and assertions by third parties that we violate their rights. These disputes may be costly to defend and could harm our business and operating results.
We currently face, and we expect to face from time to time in the future, allegations that we have violated the rights of third parties, including patent, trademark, copyright and other intellectual property rights, and the rights of current and former employees, users and business owners. For example, various businesses have sued us alleging that we manipulate Yelp reviews in order to coerce them and other businesses to pay for Yelp advertising.
The nature of our business also exposes us to claims relating to the information posted on our platform, including claims for defamation, libel, negligence and copyright or trademark infringement, among others. For example, businesses have in the past claimed, and may in the future claim, that we are responsible for the defamatory reviews posted by our users. We expect claims like these to continue, and potentially increase in proportion to the amount of content on our platform. In some instances, we may elect or be compelled to remove the content that is the subject of such claims, or may be forced to pay substantial damages if we are unsuccessful in our efforts to defend against these claims. For example, recently enacted legislation in Germany may impose significant fines for failure to comply with certain content removal and disclosure obligations. If we elect or are compelled to remove content from our platform, our products and services may become less useful to consumers and our traffic may decline, which would have a negative impact on our business. This risk may increase if Congressional efforts to restrict the protections afforded us by Section 230 of the Communications Decency Act are successful. This risk may also be greater in certain jurisdictions outside of the United States where our protection from such liability may be unclear.
We are also regularly exposed to claims based on allegations of infringement or other violations of intellectual property rights. Companies in the Internet, technology and media industries own large numbers of patent and other intellectual property rights, and frequently enter into litigation. Various “non-practicing entities” that own patents and other intellectual property rights also often aggressively attempt to assert their rights in order to extract value from technology companies. From time to time, we receive notice letters from patent holders allegingcomplaints that certain of our products and services infringe their patentmay violate the intellectual property rights of others, and we are presentlyhave previously been involved in numerous patent lawsuits, including lawsuits involving plaintiffs targeting multiple defendants in the same or similar suits. While we are pursuing a number of patent applications, we currently have only limited patent protection for our core business, and the contractual restrictions and trade secrets that protect our proprietary technology provide only
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limited safeguards against infringement. This may make it more difficult to defend certain of our intellectual property rights, particularly related to our core business.
We expect other claims to be made against us in the future, and as we face increasing competition and gain an increasingly high profile, we expect the number of claims against us to accelerate. The results of litigation and claims to which we may be

subject cannot be predicted with any certainty. Even if the claims are without merit, the costs associated with defending against them may be substantial in terms of time, money and management distraction. In particular, patent and other intellectual property litigation may be protracted and expensive, and the results may require us to stop offering certain features, purchase licenses or modify our products and features while we develop non-infringing substitutes, or otherwise involve significant settlement costs. The development of alternative non-infringing technology or practices could require significant effort and expense or may not be feasible. Even if claims do not result in litigation or are resolved in our favor without significant cash settlements, such matters, and the time and resources necessary to resolve them, could harm our business, results of operations and reputation.

Our business is subject to complex and evolving U.S. and foreign regulations and other legal obligations related to privacy, data protection and other matters. Our actual or perceived failure to comply with such regulations and obligations could harm our business.
We are subject to a variety of laws in the United States and abroad that involve matters central to our business, including laws regarding privacy, data retention, distribution of user-generated content and consumer protection, among others. For example, because we receive, store and process personal information and other user data, including credit card information, we are subject to numerous federal, state and local laws around the world regarding privacy and the storing, sharing, use, processing, disclosure and protection of personal information and other user data. We are also subject to a variety of laws, regulations and guidelines that regulate the way we distinguish paid search results and other types of advertising from unpaid search results.
The application and interpretation of these laws and regulations are often uncertain, particularly in the new and rapidly evolving industry in which we operate. For example, we rely on laws limiting the liability of providers of online services for activities of their users and other third parties. These laws are currently being tested by a number of claims, including actions based on invasion of privacy and other torts, unfair competition, copyright and trademark infringement and other theories based on the nature and content of the materials searched, the ads posted or the content provided by users. There have also been various Congressional efforts to restrict the scope of the protections available to online platforms under Section 230 of the Communications Decency Act, and our current protections from liability for third-party content in the United States could decrease or change as a result.
It is also possible that the interpretation and application of various laws and regulations may conflict with other rules or our practices, such as industry standards to which we adhere, our privacy policies and our privacy-related obligations to third parties (including, in certain instances, voluntary third-party certification bodies). Similarly, our business could be adversely affected if new legislation or regulations are adopted that require us to change our current practices or the design of our platform, products or features. For example, regulatory frameworks for privacy issues are currently in flux worldwide, and are likely to remain so for the foreseeable future due to increased public scrutiny of the practices of companies offering online services with respect to personal information of their users. The U.S. government, including the Federal Trade Commission and the Department of Commerce, and many state governments are reviewing the need for greater regulation of the collection, processing, storage and use of information about consumer behavior on the Internet, including regulation aimed at restricting certain targeted advertising practices. In April 2016, the European Commission approved a new safe harbor program, the E.U.-U.S. Privacy Shield, covering the transfer of personal data from the European Union to the United States, and a new general data protection regulation is expected to taketook effect in the European Union in May 2018, each of which may be subject to varying interpretations and evolving practices whichthat would create uncertainty for us and possibly resultus. Similarly, the California Consumer Privacy Act, or CCPA, which became effective in significantly greater compliance burdensJanuary 2020, created new data privacy rights for companies such as us with users and operations in Europe.it remains unclear how this legislation will be interpreted. Changes like these could increase our administrative costs and make it more difficult for consumers to use our platform, resulting in less traffic and revenue. Such changes could also make it more difficult for us to provide effective advertising tools to businesses on our platform, resulting in fewer advertisers and less revenue. For example, if privacy legislation negatively impacts our ability to measure the effectiveness of our products, such as our ability to offer store-level attribution through integrations with third-party data partners, our ability to maintain and expand our base of advertisers will be harmed.

We believe that our policies and practices comply with applicable laws and regulations. However, if our belief proves incorrect, if these guidelines, laws or regulations or their interpretations change or new legislation or regulations are enacted, or if the third parties with whom we share user information fail to comply with such guidelines, laws, regulations or their
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contractual obligations to us, we may be forced to implement new measures to reduce our legal exposure. This may require us to expend substantial resources, delay development of new products or discontinue certain products or features, which would negatively impact our business. For example, if we fail to comply with our privacy-related obligations to users or third parties, or any compromise of security that results in the unauthorized release or transfer of personally identifiable information or other user data, we may be compelled to provide additional disclosures to our users, obtain additional consents from our users before collecting or using their information or implement new safeguards to help our users manage our use of their information, among other changes. We may also face litigation, governmental enforcement actions or negative publicity, which could cause our users and advertisers to lose trust in us and have an adverse effect on our business. For example, from time to time we receive inquiries from government agencies regarding our business practices. Although the internal resources expended and expenses incurred in connection with such inquiries and their resolutions have not been material to date, any resulting negative publicity could adversely affect our reputation and brand. Responding to and resolving any future litigation, investigations, settlements or other regulatory actions may require significant time and resources, and could diminish confidence in and the use of our products.


Domestic and certain foreign laws may be interpreted and enforced in ways that impose new obligations on us with respect to Yelp Deals, which may harm our business and results of operations.
Our Yelp Deals products may be deemed gift certificates, store gift cards, general-use prepaid cards or other vouchers, or “gift cards,” subject to, among other laws, the federal Credit Card Accountability Responsibility and Disclosure Act of 2009 (the “Credit CARD Act”) and similar state and foreign laws. Many of these laws include specific disclosure requirements and prohibitions or limitations on the use of expiration dates and the imposition of certain fees. Various companies that provide deal products similar to ours have been subject to allegations that their deal products are subject to and violate the Credit CARD Act and various state laws governing gift cards. Lawsuits have also been filed in other locations in which we sell or plan to sell our Yelp Deals, such as the Canadian province of Ontario, alleging similar violations of provincial legislation governing gift cards.
The application of various other laws and regulations to our products, and particularly our Yelp Deals and Gift Certificates, is uncertain. These include laws and regulations pertaining to unclaimed and abandoned property, partial redemption, refunds, revenue-sharing restrictions on certain trade groups and professions, sales and other local taxes and the sale of alcoholic beverages. In addition, we may become, or be determined to be, subject to federal, state or foreign laws regulating money transmitters or aimed at preventing money laundering or terrorist financing, including the Bank Secrecy Act, the USA PATRIOT Act and other similar future laws or regulations.
If we become subject to claims or are required to alter our business practices as a result of current or future laws and regulations, our revenue could decrease, our costs could increase and our business could otherwise be harmed. In addition, the costs and expenses associated with defending any actions related to such additional laws and regulations and any payments of related penalties, fines, judgments or settlements could harm our business.
The requirements of being a public company may strain our resources, divert management’s attention and affect our ability to attract and retain qualified board members.
As a public company, we are subject to the reporting requirements of the Exchange Act, the Sarbanes-Oxley Act, the Dodd-Frank Act, the listing requirements of the New York Stock Exchange and other applicable securities rules and regulations. Compliance with these rules and regulations has increased, and will likely continue to increase, our legal and financial compliance costs, make some activities more difficult, time-consuming or costly, and place significant strain on our personnel, systems and resources. In addition, changing laws, regulations and standards relating to corporate governance and public disclosure are creating uncertainty for public companies, increasing legal and financial compliance costs and making some activities more time consuming. These laws, regulations and standards are subject to varying interpretations, in many cases due to their lack of specificity, and, as a result, their application in practice may evolve over time. This could result in continuing uncertainty regarding compliance matters, higher administrative expenses and a diversion of management’s time and attention. Further, if our compliance efforts differ from the activities intended by regulatory or governing bodies due to ambiguities related to practice, regulatory authorities may initiate legal proceedings against us and our business may be harmed. Being a public company that is subject to these rules and regulations also makes it more expensive for us to obtain and retain director and officer liability insurance, and we may in the future be required to accept reduced coverage or incur substantially higher costs to obtain or retain adequate coverage. These factors could also make it more difficult for us to attract and retain qualified members of our board of directors and qualified executive officers.

Risks Related to Ownership of Our Common Stock

Our share price has been and will likely continue to be volatile.
The trading price of our common stock has been, and is likely to continue to be, highly volatile and could be subject to wide fluctuations in response to various factors, some of which are beyond our control. During 2017, our common stock’s daily closing price ranged from $27.38 to $47.58, and was $43.37 on February 20, 2018. In addition to the factors discussed in this “Risk Factors” section and elsewhere in this Annual Report, factors that may cause volatility in our share price include:
actual or anticipated fluctuations in our financial condition and operating results;
changes in projected operating and financial results;
actual or anticipated changes in our growth rate relative to our competitors;
repurchaserepurchases of our common stock pursuant to our stock repurchase program, which could also cause our stock price to be higher that it would be in the absence of such a program and could potentially reduce the market liquidity for our stock;

announcements of changes in strategy, such as the announcement of our plan to wind down our international sales and marketing operations to focus on our core U.S. and Canadian markets;strategy;
announcements of technological innovations or new offerings by us or our competitors;
announcements by us or our competitors of significant acquisitions, strategic partnerships, joint ventures or capital-raising activities or commitments;
additions or departures of key personnel;
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actions of securities analysts who cover our company, such as publishing research or forecasts about our business (and our performance against such forecasts), changing the rating of our common stock or ceasing coverage of our company;
investor sentiment with respect to us or our competitors, business partners and industry in general;
any disruption to the proper operation of our network infrastructure or compromise of our security measures;
any failure to maintain effective controls or difficulties encountered in their implementation or improvement;
reporting on our business by the financial media, including television, radio and press reports and blogs;
fluctuations in the value of companies perceived by investors to be comparable to us;
changes in the way we measure our key metrics;
sales of our common stock;
changes in laws or regulations applicable to our solutions;
share price and volume fluctuations attributable to inconsistent trading volume levels of our shares; and
general economic and market conditions such as recessions or interest rate changes.

Furthermore, the stock markets have recently experienced extreme price and volume fluctuations that have affected and continue to affect the market prices of equity securities of many companies. These fluctuations often have been unrelated or disproportionate to the operating performance of those companies. In the past, companies that have experienced volatility in the market price of their stock have been subject to securities class action litigation. For example, onin January 18, 2018, we and certain of our officers were sued in a putative class action lawsuit alleging violations of the federal securities laws for allegedly making materially false and misleading statements. We may be the target of additional litigation of this type in the future as well. Securities litigation against us could result in substantial costs and divert our management’s time and attention from other business concerns, which could harm our business.

We cannot guarantee that our stock repurchase program will be fully consummated or that it will enhance long-term stockholder value. Share repurchases could also increase the volatility of the trading price of our stock and could diminish our cash reserves.
InSince we implemented our stock repurchase program in July 2017, our board of directors has authorized the repurchase of up to $200an aggregate of $950 million of our common stock, of which we commenced in August 2017$269 million remains available and which does not have an expiration date. Although our board of directors has authorized this repurchase program, the program does not obligate us to repurchase any specific dollar amount or to acquire any specific number of shares. We cannot guarantee that the program will be fully consummated or that it will enhance long-term stockholder value. The program could affect the trading price of our stock and increase volatility, and any announcement of a termination of this program may result in a decrease in the trading price of our stock. In addition, this program could diminish our cash reserves.and cash equivalents, and marketable securities.

We do not intend to pay dividends for the foreseeable future, and as a result, our stockholders’ ability to achieve a return on their investment will depend on appreciation in the price of our common stock.
We have never declared or paid any cash dividends on our common stock and do not intend to pay any cash dividends in the foreseeable future. We anticipate that we will retain all of our future earnings for use in the development of our business and for general corporate purposes. Any determination to pay dividends in the future will be at the discretion of our board of directors. Accordingly, investors must rely on sales of their common stock after price appreciation, which may never occur, as the only way to realize future gains on their investments.

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Anti-takeover provisions in our charter documents and under Delaware law could make an acquisition of our Company more difficult, limit attempts by our stockholders to replace or remove our current management and limit the market price of our common stock.
Provisions in our amended and restated certificate of incorporation and bylaws may have the effect of delaying or preventing a change in control or changes in our board and management. Our amended and restated certificate of incorporation and amended and restated bylaws include provisions that:

authorize our board of directors to issue, without further action by the stockholders, up to 10,000,000 shares of undesignated preferred stock;
require that any action to be taken by our stockholders be effected at a duly called annual or special meeting and not by written consent;
specify that special meetings of our stockholders can be called only by our board of directors, the Chair of our board of directors or our Chief Executive Officer;
establish an advance notice procedure for stockholder proposals to be brought before an annual meeting, including proposed nominations of persons for election to our board of directors;
establish that our board of directors is divided into three classes, with directors in each class serving three-year staggered terms;
prohibit cumulative voting in the election of directors;
provide that vacancies on our board of directors may be filled only by a majority of directors then in office, even though less than a quorum; and
require the approval of our board of directors or the holders of a supermajority of our outstanding shares of capital stock to amend our bylaws and certain provisions of our amended and restated certificate of incorporation.

These provisions may frustrate or prevent any attempts by our stockholders to replace or remove our current management by making it more difficult for stockholders to replace members of our board of directors, which is responsible for appointing the members of our management. In addition, because we are incorporated in Delaware, we are governed by the provisions of Section 203 of the Delaware General Corporation Law, which generally prohibits a Delaware corporation from engaging in any of a broad range of business combinations with any “interested” stockholder for a period of three years following the date on which the stockholder became an “interested” stockholder.

Our amended and restated certificate of incorporation provides that the Court of Chancery of the State of Delaware will be the exclusive forum for the adjudication of certain disputes, which could limit our stockholders' ability to obtain a favorable judicial forum for disputes with us or our directors, officers, or employees.

Our amended and restated certificate of incorporation provides that the Court of Chancery of the State of Delaware is the sole and exclusive forum for:

any derivative action or proceeding brought on our behalf;
any action asserting a claim of breach of a fiduciary duty owed by any director, officer or other employee of Yelp to us or our stockholders;
any action asserting a claim against us arising pursuant to any provision of the General Corporation Law of the State of Delaware, our amended and restated certificate of incorporation or our amended and restated bylaws; and
any action asserting a claim against us that is governed by the internal affairs doctrine.

This exclusive-forum provision would not apply to suits brought to enforce a duty or liability created by the Securities Act, the Exchange Act or any claim for which the U.S. federal courts have exclusive jurisdiction and further provides that any person or entity that acquires any interest in shares of our capital stock will be deemed to have notice of and consented to the provisions of such provision. This exclusive-forum provision may limit a stockholder's ability to bring a claim in a judicial
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forum that it finds favorable for disputes with us or our directors, officers, or other employees, which may discourage lawsuits against us and our directors, officers, and other employees. If a court were to find this exclusive-forum provision to be inapplicable or unenforceable in an action, we may incur additional costs associated with resolving the dispute in other jurisdictions, which could harm our business.


Future sales of our common stock in the public market could cause our share price to decline.
Sales of a substantial number of shares of our common stock in the public market, particularly sales by our directors, officers, employees and significant stockholders, or the perception that these sales might occur, could depress the market price of our common stock and could impair our ability to raise capital through the sale of additional equity securities. As of December 31, 2017,2019, we had 83,724,91671,185,468 shares of common stock outstanding.

Item 1B. Unresolved Staff Comments.
None.

Item 2. Properties.

Our principal executive offices in North America are currently located at 140 New Montgomery Street, San Francisco, California, where we lease office space pursuant to a lease agreement that expires in 2021. We lease additional office space in San Francisco, California; Scottsdale, Arizona; Chicago, Illinois; New York, New York; Pittsburgh, Pennsylvania; Washington, D.C.; and internationally in Dublin, Ireland; Toronto, Canada; London, England; and Hamburg, Germany. We believe that our properties are generally suitable to meet our needs for the foreseeable future. In addition, to the extent we require additional space in the future, we believe that it would be available on commercially reasonable terms.

Item 3. Legal Proceedings.
In August 2014, two putative class action lawsuits alleging violations of federal securities laws were filed in the U.S. District Court for the Northern District of California, naming as defendants us and certain of our officers. The lawsuits allege violations of the Exchange Act by us and our officers for allegedly making materially false and misleading statements regarding our business and operations between October 29, 2013 and April 3, 2014. These cases were subsequently consolidated and, in January 2015, the plaintiffs filed a consolidated complaint seeking unspecified monetary damages and other relief. Following the court’s dismissal of the consolidated complaint on April 21, 2015, the plaintiffs filed a first amended complaint on May 21, 2015. On November 24, 2015, the court dismissed the first amended complaint with prejudice, and entered judgment in our favor on December 28, 2015. The plaintiffs appealed this judgment to the U.S. Court of Appeals for the Ninth Circuit, which affirmed the district court's decision on November 21, 2017.
On January 18, 2018, a putative class action lawsuit alleging violations of the federal securities laws was filed in the U.S. District Court for the Northern District of California, naming as defendants us and certain of our officers. The lawsuitcomplaint, which the plaintiff amended on June 25, 2018, alleges violations of the Exchange Act by us and our officers for allegedly making materially false and misleading statements regarding our business and operations on February 9, 2017. The plaintiff seeks unspecified monetary damages and other relief. On August 2, 2018, we and the other defendants filed a motion to dismiss the amended complaint, which the court granted in part and denied in part on November 27, 2018. On October 22, 2019, the Court approved a stipulation to certify a class in this action. The case remains pending.
In addition, we are subject to other legal proceedings arising in the ordinary course of business. Although the results of litigation and claims cannot be predicted with certainty, we currently do not believe that the final outcome of any of these other matters will have a material adverse effect on our business, financial position, results of operations or cash flows.

Item 4. Mine Safety Disclosures.
Not applicable.

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PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.
Market Information
Our common stock, par value $0.000001 per share, is listed on the New York Stock Exchange LLC, ("NYSE")or NYSE, under the symbol “YELP.” We previously had two classes of common stock outstanding — Class A common stock and Class B common stock — which converted into a single class of common stock on September 22, 2016. Prior to such date, our Class A common stock, par value $0.000001 per share, was listed on the NYSE under the same symbol as our common stock. There was no public trading market for our Class B common stock, par value $0.000001 per share.
The following table sets forth on a per-share basis the high and low intraday sales prices of (i) our Class A common stock through September 22, 2016 and (ii) our common stock thereafter, in each case as reported by the NYSE for the periods presented:
 2017 2016
 High Low High Low
First Quarter$43.41
 $31.60
 $28.55
 $14.53
Second Quarter$36.25
 $26.93
 $30.54
 $19.21
Third Quarter$44.25
 $29.30
 $41.94
 $28.68
Fourth Quarter$48.40
 $40.05
 $43.36
 $32.00
On February 20, 2018, the last reported sale price of our common stock was $43.37.
Stockholders
As of the close of business on February 20, 2018,21, 2020, there were 4742 stockholders of record of our common stock. The actual number of holders of our common stock is greater than this number of record holders, and includes stockholders who are beneficial owners, but whose shares are held in street name by brokers or other nominees. This number of holders of record also does not include stockholders whose shares may be held in trust by other entities.
Dividend Policy
We have never declared or paid, and do not anticipate declaring or paying, any cash dividends on our capital stock. Any future determination as to the declaration and payment of dividends, if any, will be at the discretion of our board of directors and will depend on then-existing conditions, including our financial condition, operating results, contractual restrictions, capital requirements, business prospects and other factors that our board of directors may deem relevant.

Performance Graph
We have presented below the cumulative total return to our stockholders during the period from December 31, 20122014 through December 31, 20172019 in comparison to the NYSE Composite Index and NYSE Arca Tech 100 Index. All values assume a $100 initial investment and data for the NYSE Composite Index and NYSE Arca Tech 100 Index assume reinvestment of dividends. The comparisons are based on historical data and are not indicative of, nor intended to forecast, the future performance of our common stock.
  
Index12/31/2012 12/31/2013 12/31/2014 12/31/2015 12/31/2016 12/31/2017
Yelp Inc.100 366 290 153 202 223
NYSE Composite Index100 123 128 120 131 152
NYSE Arca Tech 100 Index100 134 153 150 167 218
yelp-20191231_g2.jpg
The information under “Performance Graph” is not deemed to be “soliciting material” or “filed” with the SEC or subject to Regulation 14A or 14C, or to the liabilities of Section 18 of the Exchange Act, and is not to be incorporated by reference in any
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filing of Yelp under the Securities Act or the Exchange Act, whether made before or after the date of this Annual Report and irrespective of any general incorporation language in those filings.
Issuer Purchases of Equity Securities
The following table summarizes our stock repurchase activity for the three months ended December 31, 20172019 (in thousands except for price per share):
Period
Total Number
of Shares Purchased(1)
Average Price Paid per Share(2)
Total Number of Shares Purchased as Part of Publicly Announced Plans or ProgramsApproximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Program
October 1 - October 31, 2019—  $—  —  $25,007  
November 1 - November 30, 2019196  $30.78  196  $18,989  
December 1 - December 31, 2019—  $—  —  $18,989  
Period 
Total Number
of Shares Purchased(1)
 
Weighted-Average Price Paid per Share(2)
 Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Program
October 1 - October 31, 2017 
 
 
 $192,253
November 1 - November 30, 2017 
 
 
 $192,253
December 1 - December 31, 2017 116
 41.77
 116
 $187,382
(1) On November 27, 2018, our board of directors authorized us to repurchase an additional $250 million of our outstanding common stock under our ongoing stock repurchase program, which the board initially authorized in July 2017. Following our completion of repurchases under this authorization, our board of directors approved a further $250 million increase to our stock repurchase program on February 11, 2019, $19 million of which remained available as of December 31, 2019.

On January 15, 2020, our board of directors authorized another $250 million increase to our stock repurchase program, bringing the total amount of repurchases authorized under our stock repurchase program to $950 million, of which approximately $269 million remains available. The timing of repurchases and number of shares repurchased depend on a variety of factors, including liquidity, cash flow and market conditions. See "Liquidity and Capital Resources—Stock Repurchase Program" included under Part II, Item 7 in this Annual Report.
(1)
(2) Average price paid per share includes costs associated with the repurchases.

On July 31, 2017, our board of directors authorized a stock repurchase program under which we may repurchase up to $200 million of our outstanding common stock, which we commenced in August 2017 and does not have an expiration date. The timing of and number of shares repurchased depend on a variety of factors, including liquidity, cash flow and market conditions. See "Liquidity and Capital ResourcesStock Repurchase Program" included under Part II, Item 7 in this Annual Report for further details.
(2)Average price paid per share includes costs associated with the repurchases.
Item 6. Selected Consolidated Financial and Other Data.
The following selected consolidated financial and other data should be read in conjunction with, and are qualified by reference to, “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” and our audited consolidated financial statements and the accompanying notes included elsewhere in this Annual Report. The consolidated statements of operations data for the years ended December 31, 2017, 20162019, 2018 and 20152017 and the consolidated balance sheet data as of December 31, 20172019 and 20162018 are derived from the audited consolidated financial statements that are included elsewhere in this Annual Report. The consolidated statements of operations data for the years ended December 31, 20142016 and 2013,2015, as well as the consolidated balance sheet data as of December 31, 2015, 20142017, 2016 and 2013,2015 are derived from audited consolidated financial statements that are not included in this Annual Report. We have included, in our opinion, all adjustments, consisting only of normal recurring adjustments, that we consider necessary for a fair presentation of the financial information set forth in those statements. Our historical results are not necessarily indicative of the results to be expected in any period in the future.  
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Consolidated Statements of Operations Data:
Year Ended December 31,
2019201820172016
2015(1)
(in thousands, except per share amounts)
Net revenue$1,014,194  $942,773  $850,847  $716,063  $549,711  
Costs and expenses:
Cost of revenue (exclusive of depreciation and amortization shown separately below)(
62,410  57,872  70,518  60,363  51,015  
Sales and marketing500,386  483,309  437,424  379,895  301,764  
Product development230,440  212,319  175,787  138,549  107,786  
General and administrative136,091  120,569  109,707  100,475  80,866  
Depreciation and amortization49,356  42,807  41,198  35,346  29,604  
Restructuring and integration—  —  288  3,455  —  
Gain on disposal of a business unit—  —  (163,697) —  —  
Total costs and expenses978,683  916,876  671,225  718,083  571,035  
Income (loss) from operations35,511  25,897  179,622  (2,020) (21,324) 
Other income, net14,256  14,109  4,864  1,694  386  
Income (loss) before income taxes49,767  40,006  184,486  (326) (20,938) 
Provision for (benefit from) income taxes8,886  (15,344) 31,491  1,385  11,962  
Net income (loss) attributable to common stockholders$40,881  $55,350  $152,995  (1,711) (32,900) 
Net income (loss) per share attributable to common stockholders:
Basic$0.55  $0.66  $1.87  $(0.02) $(0.44) 
Diluted$0.52  $0.62  $1.76  $(0.02) $(0.44) 
Weighted-average shares used to compute net income (loss) per share attributable to common stockholders:
Basic74,627  83,573  81,602  77,186  74,683  
Diluted77,969  88,709  87,170  77,186  74,683  
 Year Ended December 31,
 2017 2016 2015 2014 2013
 (in thousands, except per share amounts)
Net revenue$846,813
 $713,069
 $549,711
 $377,536
 $232,988
Costs and expenses:         
Cost of revenue (exclusive of depreciation and amortization shown separately below)(1)
70,518
 60,363
 51,015
 24,382
 16,561
Sales and marketing(1)
438,643
 382,854
 301,764
 201,050
 131,970
Product development(1)
175,787
 138,549
 107,786
 65,181
 38,243
General and administrative(1)
105,673
 97,481
 80,866
 58,274
 42,907
Depreciation and amortization(1)
41,198
 35,346
 29,604
 17,590
 11,455
Restructuring and integration(1)
288
 3,455
 
 
 675
Gain on disposal of a business unit(164,779) 
 
 
 
Total costs and expenses667,328
 718,048
 571,035
 366,477
 241,811
Income (loss) from operations179,485
 (4,979) (21,324) 11,059
 (8,823)
Other income (expense), net4,864
 1,694
 386
 221
 (407)
Income (loss) before income taxes184,349
 (3,285) (20,938) 11,280
 (9,230)
(Provision for) benefit from income taxes(31,491) (1,385) (11,962) 25,193
 (838)
Net income (loss) attributable to common stockholders$152,858
 $(4,670) $(32,900) $36,473
 $(10,068)
Net income (loss) per share attributable to common stockholders:  
 
 
 

Basic$1.87
 $(0.06) $(0.44) $0.51
 $(0.15)
Diluted$1.75
 $(0.06) $(0.44) $0.48
 $(0.15)
Weighted-average shares used to compute net income (loss) per share attributable to common stockholders:  
 
 
 

Basic81,602
 77,186
 74,683
 71,936
 65,665
Diluted87,170
 77,186
 74,683
 76,712
 65,665
(1)Stock-based compensation expense included in the statements of operations data above was as follows (in thousands):

 Year Ended December 31,
 2017 2016 2015 2014 2013
Cost of revenue$4,010
 $2,446
 $1,117
 $729
 $421
Sales and marketing28,100
 27,098
 21,962
 15,083
 10,131
Product development47,280
 36,323
 23,431
 14,804
 6,270
General and administrative21,025
 20,394
 14,332
 11,657
 9,300
Restructuring and integration
 
 
 
 555
     Total stock-based compensation$100,415
 $86,261
 $60,842
 $42,273
 $26,677
(1)Amounts for 2015 have not been recast to reflect the adoption of Accounting Standards Update 2014-09, "Revenue from Contracts with Customers (ASC 606)," or ASC 606. Refer to Note 2,"Summary of Significant Accounting Policies," of the Notes to Consolidated Financial Statements in our Annual Report on Form 10-K for the year ended December 31, 2018 for additional information regarding adoption.
Consolidated Balance Sheet Data:
As of December 31,
2019201820172016
2015(1)
(in thousands)
Cash and cash equivalents$170,281  $332,764  $547,850  $272,201  $171,613  
Property, equipment and software, net$110,949  114,800  $103,651  $92,440  $80,467  
Working capital(2)
$399,154  795,364  $826,922  $500,780  $393,505  
Total assets(3)
$1,070,700  1,175,563  $1,225,601  $894,145  $755,427  
Total long-term liabilities(3)
$181,554  35,140  $30,737  $17,621  $12,030  
Total stockholders’ equity$754,991  1,075,518  $1,108,697  $816,138  $693,620  
 As of December 31,
 2017 2016 2015 2014 2013
 (in thousands)
Cash and cash equivalents$547,850
 $272,201
 $171,613
 $247,312
 $389,764
Property, equipment and software, net103,651
 92,440
 80,467
 62,761
 30,666
Working capital(1)
826,922
 500,780
 393,505
 386,785
 391,844
Total assets1,216,512
 885,206
 755,427
 629,650
 515,977
Total stockholders’ equity1,099,608
 807,186
 693,620
 588,150
 486,483
(1) Amounts for 2015 have not been recast to reflect the adoption of ASC 606.
(1)(2) Working capital comprises total current assets less total current liabilitiesliabilities.
Other(3)  Amounts for 2019 reflect the adoption of Accounting Standards Update No. 2016-02, "Leases (Topic 842)." Refer to Note 2,"Summary of Significant Accounting Policies," of the Notes to Consolidated Financial and Operational Data:Statements for additional information regarding adoption.

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 Year Ended December 31,
 2017 2016 2015 2014 2013
 (in thousands)
Reviews(1)
148,298
 121,022
 95,210
 71,232
 52,757
Desktop Unique Visitors(2)
76,748
 67,888
 74,607
 77,628
 77,713
Mobile Web Unique Visitors(3)
64,221
 65,351
 65,860
 57,770
 42,292
App Unique Devices(4)
28,845
 24,073
 20,006
 14,541
 10,613
Claimed Local Business Locations(5)
4,189
 3,363
 2,648
 2,029
 1,488
Paying Advertising Accounts(6)
163
 135
 109
 83
 54
Adjusted EBITDA(7)
$156,607
 $120,083
 $69,122
 $70,922
 $29,429
(1)
Represents the cumulative number of reviews submitted on Yelp since inception, as of the period end, including reviews that were not recommended or that had been removed from our platform. We define a review as each individually written assessment submitted by a user who has registered by creating a public profile on our platform. For more information, including information regarding reviews that are not recommended and removed reviews, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Key Metrics—Reviews.”
(2)
Represents the average number of desktop unique visitors for the last three months of the period, calculated as the number of “users,” as measured by Google Analytics, who visited our non-mobile optimized website at least once in a given month, averaged over the three-month period. For more information, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Key Metrics—Traffic.”
(3)
Represents the average number of mobile website unique visitors for the last three months of the period, calculated as the number of “users,” as measured by Google Analytics, who visited our mobile-optimized website at least once in a given month, averaged over the three-month period. For more information, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Key Metrics—Traffic.”
(4)Represents the average number of unique mobile devices using our mobile app for the last three months of the period, calculated as the number of unique mobile devices that used our mobile app in a given month, averaged over the three month period.

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For more information, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Key Metrics—Traffic.
(5)
Represents the cumulative number of business locations that had been claimed on Yelp worldwide since 2008, as of the period end. We define a claimed local business location as each business address for which a business representative has visited our website and claimed the free business listing page for the business located at that address. For more information, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Key Metrics—Claimed Local Business Locations.”
(6)
Represents the number of business accounts from which we recognized advertising revenue during the last three months of the period. For more information, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Key Metrics—Paying Advertising Accounts.”
(7)
Adjusted EBITDA is a non-GAAP financial measure that we calculate as net income (loss), adjusted to exclude: provision for (benefit from) income taxes, other income (expense), net, depreciation and amortization, stock-based compensation expense, restructuring and integration costs and gain on disposal of a business. We believe that adjusted EBITDA provides useful information to investors for understanding and evaluating our operating results in the same manner as our management and our board of directors. This non-GAAP information is not necessarily comparable to non-GAAP information of other companies, and should not be viewed as a substitute for, or superior to, net income (loss) prepared in accordance with GAAP as a measure of our profitability. Users of this financial information should consider the types of events and transactions for which adjustments have been made. For more information about adjusted EBITDA, as well as a reconciliation of net income (loss) to this non-GAAP financial measure, see “Management’s Discussion and Analysis of Financial Condition and Results of Operation—Non-GAAP Financial Measures—Adjusted EBITDA.
Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.
The following discussion and analysis of our financial condition and results of operations should be read in conjunction with our consolidated financial statements and related notes appearing elsewhere in this Annual Report. This discussion contains forward-looking statements that reflect our plans, estimates and beliefs, and involve risks and uncertainties. Our actual results and the timing of certain events could differ materially from those anticipated in these forward-looking statements as a result of several factors, including those discussed in the section titled “Risk Factors”Risk Factors included under Part I, Item 1A and elsewhere in this Annual Report. See “SpecialSpecial Note Regarding Forward-Looking Statements”Statements in this Annual Report.

Overview
As a trusted local resource, we deliver significant value to both consumers and businesses by helping each discover and interact with the leading localother. Our unrivaled content helps consumers save time and money. Our advertising and other products help business review siteowners increase their visibility and connect with our large audience of purchase-oriented consumers.
Our comprehensive, mobile-first platform offers reservation and waitlist, food ordering and quote request capabilities, among many other opportunities for consumers to engage with businesses, in addition to the 189.9 million reviews available as of December 31, 2019. In the fourth quarter of 2019, these features attracted a monthly average audience of nearly 35.6 million app unique devices, allowed over 8.8 million diners to make reservations or join a restaurant waitlist, and facilitated consumer submissions of 2.1 million projects to service providers through Request-A-Quote. In the same period, business owners, in turn, promoted their businesses to our large audience by spending 10% more on our advertising products than in the United States, we offer consumers unmatched local business information, as well as a convenient platform on which they can discover, engagefourth quarter of 2018, seated more than double the number of diners via Yelp compared to the fourth quarter of 2018, and transact with local businesses to meet their everyday needs. Our value proposition to businesses is simple: we provide the opportunity to connect with thereceived millions of purchase-intent driven consumersleads through our ad products; messaging features, such as Request-A-Quote; the Yelp Platform, our transaction platform; and retention tools, among other ways.Request-A-Quote.
We derive substantially all of our revenue from the sale of advertising products. In the year ended December 31, 2017,2019, our net revenue was $846.8 million,$1.0 billion, which represented an increase of 19%8% from the year ended December 31, 2016,2018, and we recorded net income of $152.9$40.9 million and adjusted EBITDA of $156.6$213.5 million. In the year ended December 31, 2016,2018, our net revenue was $713.1$942.8 million, which represented an increase of 30%11% from the year ended December 31, 2015,2017, and we recorded a net lossincome of $4.7$55.4 million and adjusted EBITDA of $120.1$183.1 million. For information on how we define and calculate adjusted EBITDA and a reconciliation of this non-GAAP financial measure to net income (loss), see “Non-GAAP Financial Measures” below.
Our success is primarily
Following our transition to a multi-channel, on-demand business model, which we completed in 2018 with our move to non-term advertising contracts, we embarked on an ambitious, multi-year business transformation plan designed to drive and sustain profitable long-term growth. As we continue executing on our plan in 2020, we will look to further advance the result ofstrategic initiatives we began in 2019:
Winning in Key Categories. We made significant investmentaccomplishments in 2019 in our communities, employees, content, brandkey categories of restaurants and technology.home & local services. In restaurants, we more than doubled the number of diners seated via Yelp and increased the combined revenue attributable to Yelp Reservations and Yelp Waitlist by a double-digit percentage compared to 2018, while in home & local services we significantly increased paid leads to advertisers and increased revenue attributable to Request-A-Quote by nearly 60% compared to 2018. We believe that continued investment in our business provides our largest opportunitythese categories continue to present substantial opportunities for futurerevenue growth, and plan to continue investing for long-term growthpursue those opportunities in 2020 by focusing on the following priorities in 2018:
Driving Monetization. In 2017, the expansionincreasing monetization of our self-serve sales channelrestaurants offerings through price optimization and scalingcross selling, and increasing the number of paid leads delivered to home & local services advertisers.
Expanding Our Product Offerings. Our introduction of a range of paid products at affordable price points over the course of 2019, including our customer success team led to improvementsBusiness Highlights, Portfolios and Yelp Connect products, attracted thousands of new customers and helped accelerate revenue growth in our abilityself-serve channel to attract30% in 2019. Matching advertisers to the right products at the right prices will be a top priority for us in 2020, and retain advertisers. In 2018, we plan to introduce additional profile products in 2020 that will help business owners tell their stories and build on these effortstrust with customers.
Providing More Value to Business Owners. In 2019, we delivered significantly more value to our customers — we generated 34% more ad clicks for Yelp advertisers at an average CPC 18% lower than in 2018 — and saw improved retention among non-term advertisers as a result. We accomplished this through improvements to our advertising auction system and ad targeting, as well as by offering our full-serve customers flexibleexpanding advertising terms and customization options previously available only to self-serve customers. We believe this will resultinventory in a more efficient sales process and encourage businesses to try advertising on our platform. While this may result in higher turnover rates for new advertisers, we believe it will ultimately be outweighed by the resulting increase in customer satisfaction and our improved revenue retention abilities.
Generating Strong Usage and Engagement. Althoughcertain categories such as home & local services. In 2020, we plan to continue investinggenerating more value for our business customers through initiatives including further enhancements to our auction system, improvements to our Request-A-Quote lead matching and introducing new types of advertising inventory.
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Capturing the Multi-location Opportunity. Our multi-location advertising business grew 22% in performance marketing2019 from the prior year, and our initiatives to increase our business with the top 250 restaurants and retailers by revenue successfully resulted in 2018, organic growth drivena substantial number of such businesses becoming paying customers by the end of the year. We plan to drive continued momentum in our communitymulti-location advertising business in 2020 by growing our multi-location sales team to expand our coverage to the services category, as well as by continuing to integrate product development with sales efforts continuesthrough the introduction of new ad formats tailored to be the primary driverneeds of multi-location businesses.
Enhancing the Consumer Experience. In addition to successfully increasing the number of paid leads we delivered to advertisers while maintaining an engaging experience for consumers, we enhanced the consumer experience through more personalized recommendations, new Yelp Waitlist features and expanded restaurant health inspection scores. An engaged consumer base is at the heart of our traffic. To that end, in 2018value proposition to businesses, and we plan to expanddrive engagement in 2020 through an updated user interface for our community management team tomobile app (where we find our most engaged users) that offers improved convenience and ease of use.
Improved Profitability. In the neighborhood level by introducing Neighborhood

Ambassadors to somefirst year of our most established markets, such asmulti-year business transformation plan, we improved the Bay Area, New York and Boston. We also plan to continue our consumer protection efforts to safeguard the integritystructural economics of our reviewsbusiness. Our focus on growth and our reputation.
Strengthening Our Competitive Position in the Restaurant Category. Our restaurants category receives the most traffic and reviews of any category on our platform. To strengthen our competitive advantage in this important area, we plan to investretention in our Yelp Reservations and Yelp Nowait productshighest-margin sales channels allowed us to increase revenue growth without expanding our local sales force; in fact, we reduced local sales headcount by further integrating their functionality into our core user experience.10% in 2019. We also expect to complete our integration of Grubhub's restaurant network by mid-2018, which will increase the number and quality of restaurants offering online ordering through the Yelp Platform. We anticipate that our investments in this area will result in increased sales and marketing and product development expenses in 2018, but believe that they are critical to our future success.
Building Out Our Home & Local Services Offering. In 2017, our Request-A-Quote feature helped drive growth in our largest category by revenue, Home & Local Service, both by facilitating connections between consumers and businesses and as an engine of financial growth through our existing cost-per-click ad model. In 2018, we plan to further refine the product throughthese structural improvements to the process by whichhelp drive profitable growth again in 2020 as we match consumers initiating requests with businesses, among other things. We are also exploring new wayscontinue to monetize Request-A-Quote that better reflect the value of these high-converting leads.
emphasize our most efficient sales channels as well as work to improve retention, optimize our cost structure and control expenses.
We expect to continue to invest in capital expenditures in 2018product development, personnel and the facilities to support the growth ofthem in 2020 as we work to grow our business, primarilyincluding investments to increase our office space, upgrade our technology and infrastructure to improve the ability of our platform to handle the projected increase in usage, and enable the release of new featuresproducts and solutions.features. As a result of this investment philosophy, we expect that our operating expenses will continue to increase for the foreseeable future.

Factors Affecting Our Performance
Our Ability to Attract and Retain Advertisers. Our revenue growth is driven by our ability to attract and retain advertising customers. To do so, we must deliver compelling ad products in an effective manner, at prices that compare favorably to those of our competitors. Our advertisers typically do not have long-term obligations to purchase our products. A substantial and increasing portion also have the ability to cancel their ad campaigns at any time. Their decisions to renew depend on the degree of satisfaction with our products as well as a number of factors that are outside of our control, including their ability to continue their operations and spending levels. Although we have shifted our focus to the opportunity presented by multi-location businesses recently, we continue to rely heavily on SMBs that often have limited advertising budgets and that may view online advertising products like ours as experimental and unproven.
Our ability to maintain and expand our advertiser base also depends on the size and productivity of our sales force and customer success team. As we continue to invest in expanding our multi-location sales organization while maintaining a large local sales force, we must efficiently scale our operations while at the same time recruiting, training and integrating new hires and developing, motivating and retaining existing employees. Similarly, in order to retain, and take advantage of opportunities to deepen our relationships with, our existing customers, we must continue our efforts to build out our customer success team. Developing our account retention processes will be particularly important as an increasing portion of our advertisers have the ability to cancel their contracts at any time. In addition, as we make periodic adjustments to our sales organization to respond to market opportunities and to pursue initiatives to increase productivity, such changes may result in a temporary lack of focus or disruption to our operations. For example, it took time for our sales and customer success organizations to adapt to selling and supporting advertising contracts with flexible cancellation terms. Our increased emphasis on our multi-location and self-serve channels involves changes to our sales organization and sales force hiring priorities, which may be disruptive to our sales operations.
Traffic and User Engagement. We derive substantially all of our revenue from advertising, and traffic to our platform determines the number of ads we are able to show, affects the value of those ads to businesses and influences the content creation that drives further traffic. As a result, our ability to grow our business depends on our ability to increase traffic on our platform, which in turn depends on, among other things, the quality of our content and the prominence of links to our platform in Internet search engine results and application marketplaces. The number of users we attract from search engines in particular can be affected by a number of factors not in our direct control; changes in a search engine’s ranking algorithms, methodologies or design layouts may result in links to our website not being prominent enough to drive traffic to our website and mobile app. In addition, certain providers of Internet search engines and application marketplaces offer products and services that compete
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directly with our products and, in some instances, such providers may change their displays or rankings in order to promote their own competing products or services.
We anticipate that our traffic growth will continue to slow over time, and potentially decrease in certain periods, as our business matures and we achieve higher penetration rates in our core markets of the United States and Canada. We also expect the cyclicality and seasonality in our business to become more pronounced as our business matures, including weaker traffic in the fourth quarter of the year. As our traffic growth rate slows, our success will become increasingly dependent on our ability to increase levels of user engagement on our platform, which itself depends on the quality of our content and our ability to introduce new and improved products that effectively address consumer needs, among other things.
Our Ability to Attract and Retain Advertisers. Our revenue growth is driven by our ability to attract and retain advertising customers. To do so, we must deliver compelling ad products in an effective manner, at prices that compare favorably to those of our competitors. Our advertisers typically do not have long-term obligations to purchase our products, and an increasing portion have the ability to cancel their ad campaigns at any time. Their decisions to renew depend on the degree of satisfaction with our products as well as a number of factors that are outside of our control, including their ability to continue their operations and spending levels. The small and medium-sized businesses on which we heavily rely often have limited advertising budgets and may be disproportionately affected by economic downturns. As a result, a worsening economic outlook would likely cause businesses to decrease investments in advertising, which could adversely affect our revenue.
Our ability to maintain and expand our advertiser base also depends on the size and productivity of our sales force and customer success team. As we continue to invest in expanding our sales organization, we must efficiently scale our operations while at the same time recruiting, training and integrating new hires and developing, motivating and retaining existing employees. Similarly, in order to retain, and take advantage of opportunities to deepen our relationships with, our existing customers, we must continue our efforts to build out our customer success team. Developing our account retention processes will be particularly important as an increasing portion of our advertisers have the ability to cancel their contracts at any time. In addition, as we make periodic adjustments to our sales organization to respond to market opportunities and to pursue initiatives to increase productivity, such changes may result in a temporary lack of focus or disruption to our operations. For example, it may take time for our sales and customer success organizations to adapt to selling and supporting advertising contracts with flexible cancellation terms.
Product Innovation. We must deliver innovative, relevant and useful products to consumers and businesses — including products for mobile and other alternative devices — to expand the size and engagement of our user base, attract advertisers and

increase our revenue. We plan to continue investing in new product development as we introduce new advertising and e-commerce products, explore new platforms and distribution channels, and develop partner arrangements that provide incremental value to our users and advertisers to encourage them to increase their usage of, and the portion of their advertising budgets allocated to, our platform. As our industry evolves and competition intensifies, our investments may increasingly include products and services outside of our historical core business, such as our planned investments incontinued development of Yelp Reservations Yelp Nowait and Yelp WiFi Marketing in 2018.Waitlist. These investments involve significant risks and uncertainties, such as distracting management, and may ultimately fail to generate sufficient revenue or other value to justify our investments in them.
Investment in Growth. We have invested, and intend to continue to invest, aggressively to support the growth of our communities and platform. We dedicate significant resources to areas such as: marketing and community development;marketing; consumer protection; maintaining and enhancing the Yelp brand; and upgrading our systems, technology and network infrastructure to accommodate growth. Our investment plans for 20182020 include the neighborhood-level expansion ofdeveloping new advertising products, further developing our community management teamanalytics tools for advertisers, improving our Request-A-Quote matching capabilities and continuingrefining our performance marketing program aimed at attracting more users and advertisers. We expect thatadvertising auction system. While we believe these initiatives will ultimately drive revenue growth, our investments in them will increase our operating expenses, and that any increase in revenue resulting from these product innovations will likely trail the increase in expenses.
Stock Repurchases. In July 2017, our board of directors authorized a stock repurchase program under which we mayfor the repurchase up to $200 million of our outstanding common stock. WeDuring the years ended December 31, 2018 and 2017, we repurchased on the open market 302 thousandand subsequently retired 4,896,003 shares and 302,206 shares, respectively, for aggregate purchase prices of $187.4 million and $12.6 million, respectively. On each of November 27, 2018 and February 11, 2019, our board of directors authorized us to repurchase up to an additional $250 million of our outstanding common stock pursuant to the stock repurchase program, of which we repurchased on the open market and subsequently retired 14,190,409 shares for an aggregate purchase price of approximately $12.6$481.0 million during the year ended December 31, 2017.2019. On January 15, 2020, our board approved a further increase of $250 million to our stock repurchase program, bringing the total amount of repurchases authorized under our stock repurchase program to $950 million, of which approximately $269 million remains available. We have funded thesethe repurchases, and expect to fund any future repurchases under the stock repurchase program, with cash available on our balance sheet. As a result, this program could diminish our cash reserves and reduce our ability to invest in our business, in addition to affecting the trading price and volatility of our stock.
Corporate Development Activities. As part of our business strategy, we may decide to expand our product offerings and grow our business through the acquisition of complementary businesses or technologies. We may also sell existing business lines or technologies, as we did with our Yelp Eat24 business, which we sold to Grubhub in October 2017.well as through partnerships. In addition to diverting our management's attention and otherwise disrupting our operations, our corporate development activities will affect our future financial results due to factors such as expenses incurred in identifying, investigating and pursuing transactions, whether or not they are consummated, possible dilutive issuances of equity securities or the incurrence of debt, unidentified liabilities and the amortization of acquired intangible assets. Maintaining relationships with partners also requires significant time and resources, as does integrating their data, services and technologies onto our platform. We may not realize the full benefits of synergies, innovation and operational efficiencies that may be possible from a corporate transaction; similarly, if our relationships with partners deteriorate, we could suffer increased costs and delays in our ability to provide consumers and advertisers with our content or services.
Seasonality and Cyclicality. Our business is affected by seasonal fluctuations in Internet usage and advertising spending, as well as cyclicality in economic activity. Based on historical trends, we expect traffic numbers to be weakest in the fourth quarter of the year in connection with end of the year holidays. In addition, although our multi-location customers tend to increase spending on advertising in the fourth quarter, the SMBs on which we rely heavily typically decrease their advertising spending during this quarter. SMBs may be disproportionately affected by negative fluctuations in the business cycle, and a worsening economic outlook would likely cause such businesses to decrease investments in advertising, which would adversely affect our revenue. As our business matures and the proportion of our customers who can cancel their ad campaigns at any time
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increases, we expect that the seasonality and cyclicality in our business may become more pronounced, causing our operating results to fluctuate.

Key Metrics
We regularly review a number of metrics, including the key metrics set forth below, to evaluate our business, measure our performance, identify trends in our business, prepare financial projections and make strategic decisions. Unless otherwise stated, these metrics do not include metrics for Yelp Eat24, Yelp Reservations, Yelp Nowait,Waitlist, Yelp WiFi Marketing, or from our business owner products.products or Yelp Eat24, which we sold on October 10, 2017.
Reviews
Number of reviews represents the cumulative number of reviews submitted to Yelp since inception, as of the period end, including reviews that were not recommended or had been removed from our platform. In addition to the text of the review, each review includes a rating of one to five stars. We include reviews that are not recommended and that have been removed because all of them are either currently accessible on our platform or were accessible at some point in time, providing information that may be useful to users to evaluate businesses and individual reviewers. Because our automated recommendation software continually reassesses which reviews to recommend based on new information that becomes available, the “recommended” or “not recommended” status of reviews may change over time. Reviews that are not recommended or that have been removed do not factor into a business’s overall star rating. By clicking on a link on a reviewed business’s page on our website, users can access the reviews that are not currently recommended for the business, as well as the star rating and other information about reviews that were removed for violation of our terms of service.
As of December 31, 2017,2019, approximately 137.7189.9 million reviews were available on business listing pages, including approximately 31.744.4 million reviews that were not recommended, after 10.615.5 million reviews had been removed from our platform, either by us for violation of our terms of service or by the users who contributed them. The following table presents the number of cumulative reviews as of the dates indicated (in thousands):
 As of December 31,
 2017 2016 2015
Reviews148,298 121,022 95,210


As of December 31,
 201920182017
Reviews205,381  177,385  148,298  
Traffic
Traffic to our website and mobile app has three components: mobile devices accessing our mobile app, visitors to our non-mobile optimized website, (our “desktop website”),which we refer to as our desktop website, and visitors to our mobile-optimized website, (our “mobile website”) and mobile devices accessingwhich we refer to as our mobile app. website. App users generate a substantial majority of activity on Yelp, including the page views and ad clicks that we monetize. We anticipate that our mobile traffic will be the driver of our growth for the foreseeable future and that traffic to our website will fluctuate and generally decline as we focus on driving traffic to our mobile app, where we have our most engaged users and which reduces our reliance on Google and other search engines.
We use the following metrics set forth below to measure each of theseour traffic streams:streams. An individual user who accesses our platform through multiple traffic streams will be counted in each applicable traffic metric; as a result, the sum of our traffic metrics will not accurately represent the number of people who visit our platform on an average monthly basis.
App Unique Devices. We calculate app unique devices as the number of unique mobile devices using our mobile app in a given month, averaged over a given three-month period. Under this method of calculation, an individual who accesses our mobile app from multiple mobile devices will be counted as multiple app unique devices. Multiple individuals who access our mobile app from a shared device will be counted as a single app unique device.
The following table presents app unique devices for the periods indicated (in thousands):
Three Months Ended December 31,
201920182017
App Unique Devices35,599  32,891  28,845  
43

Desktop and Mobile Website Unique Visitors. We calculate desktop unique visitors as the number of “users,” as measured by Google Analytics, who have visited our desktop website at least once in a given month, averaged over a given three-month period. Similarly, we calculate mobile website unique visitors as the number of “users” who have visited our mobile website at least once in a given month, averaged over a given three-month period.
Google Analytics, a product from Google Inc. that provides digital marketing intelligence, measures “users” based on unique cookie identifiers. Because the numbers of desktop unique visitors and mobile website unique visitors are therefore based on unique cookies, an individual who accesses our desktop website or mobile website from multiple devices with different cookies may be counted as multiple desktop unique visitors or mobile website unique visitors, as applicable, and multiple individuals who access our desktop website or mobile website from a shared device with a single cookie may be counted as a single desktop unique visitor or mobile website unique visitor.
App Unique Devices. We calculate app unique devices as the number of unique mobile devices using our mobile app in a given month, averaged over a given three-month period. Under this method of calculation, an individual who accesses our mobile app from multiple mobile devices will be counted as multiple app unique devices. Multiple individuals who access our mobile app from a shared device will be counted as a single app unique device.
We anticipate that our mobile traffic will be the driver of our growth for the foreseeable future.
The following table presents our web traffic for the periods indicated (in thousands):
Three Months Ended December 31,
201920182017
Desktop Unique Visitors54,006  62,140  76,748  
Mobile Web Unique Visitors68,756  69,148  64,221  
 Three Months Ended December 31,
 2017 2016 2015
Desktop Unique Visitors76,748 67,888 74,607
Mobile Web Unique Visitors64,221 65,351 65,860
App Unique Devices28,845 24,073 20,006

As previously reported, a portionWe have discovered in the past, and expect to discover in the future, that portions of our desktop traffic, as measured by Google Analytics, since the third quarter of 2016 hashave been attributable to a single robot.robots and other invalid sources. Because the traffic from this robotsuch sources does not represent valid consumer traffic, our reported desktop unique visitor metric for impacted periods reflects an adjustment to the Google Analytics measurement of our traffic to remove traffic that we have adjusted the number of desktop unique visitors we are reporting above to remove such trafficidentified as originating from invalid sources to provide greater accuracy and transparency. However, we cannot assure you that we will be able to identify all such traffic for any particular period. For additional information, please see the risk factor included under Part I, Item 1A under the heading “We rely on data from both internal tools and third parties to calculate certain of our performance metrics. Real or perceived inaccuracies in such metrics may harm our reputation and negatively affect our business.”
Active Claimed Local Business Locations
The number of active claimed local business locations represents the cumulative number of business locations that have been claimed on Yelp worldwide since 2008, as of a given date. We define a claimed local business location as eachlocations — business addressaddresses for which a business representative has visited our websiteplatform and claimed the free business listing page for the business located at that address. address — that are both (a) active on Yelp and (b) associated with an active business owner account as of a given date. We consider a claimed local business location to be active if it has not closed, been removed from our platform or merged with another claimed local business.
The following table presents the number of cumulativeactive claimed local business locations as of the dates presented (in thousands):. The December 31, 2018 and 2017 numbers have been updated to reflect our current methodology for calculating active claimed local business locations.
 As of December 31,
 2017 2016 2015
Claimed Local Business Locations4,189 3,363 2,648
As of December 31,
201920182017
Active Claimed Local Business Locations4,913  4,310  3,681  
Paying Advertising AccountsLocations
Paying advertising accountslocations comprise all business accountslocations associated with a business account from which we recognized advertising revenue in a given month, excluding business accounts that purchased advertising through partner programs other than Yelp Ads Certified Partners, averaged over a given three-month period. As with our advertising revenue classification, paying advertising accounts excludes subscription services customers that are not also advertising customers. The following table presents the number of paying advertising accounts duringlocations for the periods presented (in thousands):

Three Months Ended December 31,
201920182017
Paying Advertising Locations565  541  478  

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 Three Months Ended December 31,
 2017 2016 2015
Paying Advertising Accounts163 135 109
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Non-GAAP Financial Measures
Our consolidated financial statements are prepared in accordance with GAAP. However, we have also disclosed below EBITDA, adjusted EBITDA and non-GAAP net income, which are non-GAAP financial measures. We have included EBITDA, adjusted EBITDA and non-GAAP net income because they are key measures used by our management and board of directors to understand and evaluate our operating performance and trends, to prepare and approve our annual budget and to develop short- and long-term operational plans. In particular, the exclusion of certain expenses in calculating EBITDA, adjusted EBITDA and non-GAAP net income can provide a useful measure for period-to-period comparisons of our primary business operations. Accordingly, we believe that EBITDA, adjusted EBITDA and non-GAAP net income provide useful information to investors and others in understanding and evaluating our operating results in the same manner as our management and board of directors.
EBITDA, adjusted EBITDA and non-GAAP net income have limitations as analytical tools, and you should not consider them in isolation or as substitutes for analysis of our results as reported under GAAP. In particular, EBITDA, adjusted EBITDA and non-GAAP net income should not be viewed as substitutes for, or superior to, net income (loss) prepared in accordance with GAAP as a measure of profitability or liquidity. Some of these limitations are:
although depreciation and amortization are non-cash charges, the assets being depreciated and amortized may have to be replaced in the future, and EBITDA, adjusted EBITDA and non-GAAP net income do not reflect all cash capital expenditure requirements for such replacements or for new capital expenditure requirements;
EBITDA, adjusted EBITDA and non-GAAP net income do not reflect changes in, or cash requirements for, our working capital needs;
adjusted EBITDA and non-GAAP net income do not consider the potentially dilutive impact of equity-based compensation;
EBITDA, adjusted EBITDA and non-GAAP net income do not reflect the impact of the valuation allowance recording or release;
EBITDA and adjusted EBITDA do not reflect tax payments that may represent a reduction in cash available to us; and
other companies, including companies in our industry, may calculate EBITDA, adjusted EBITDA and non-GAAP net income differently, which reduces their usefulness as comparative measures.
Because of these limitations, you should consider EBITDA, adjusted EBITDA and non-GAAP net income alongside other financial performance measures, including net income (loss), and our other GAAP results. The tables below present reconciliations of net income (loss) to EBITDA, adjusted EBITDA and non-GAAP net income , the most directly comparable GAAP financial measure in each case, for each of the periods indicated.
EBITDA and Adjusted EBITDA
EBITDA is a non-GAAP financial measure that we calculate as net income (loss), adjusted to exclude: provision for (benefit from) income taxes; other (income) expense, net; and depreciation and amortization. EBITDA for the year ended December 31, 2017 was $220.7 million.
Adjusted EBITDA is a non-GAAP financial measure that we calculate as net income (loss), adjusted to exclude: provision for (benefit from) income taxes; other income (expense), net; depreciation and amortization; stock-based compensation expense; gain on disposal of a business unit; and restructuring and integration costs. Adjusted EBITDA for the year ended December 31, 2017 was $156.6 million.
The following is a reconciliation of net income (loss) to EBITDA and adjusted EBITDA (in thousands):

 Year Ended December 31,
 2017 2016 2015 2014 2013
Reconciliation of GAAP Net Income (Loss) to EBITDA and adjusted EBITDA:         
GAAP net income (loss)$152,858
 $(4,670) $(32,900) $36,473
 $(10,068)
Provision for (benefit from) income taxes31,491
 1,385
 11,962
 (25,193) 838
Other (income) expense, net(4,864) (1,694) (386) (221) 407
Depreciation and amortization41,198
 35,346
 29,604
 17,590
 11,455
EBITDA220,683
 30,367
 8,280
 28,649
 2,632
Stock-based compensation100,415
 86,261
 60,842
 42,273
 26,122
Gain on disposal of a business unit(164,779) 
 
 
 
Restructuring and integration costs(1)
288
 3,455
 
 
 675
Adjusted EBITDA$156,607
 $120,083
 $69,122
 $70,922
 $29,429
(1)Restructuring and integration includes $0.6 million in stock-based compensation expense for the year ended December 31, 2013.
Non-GAAP Net Income
Non-GAAP net income is a non-GAAP financial measure that we calculate as GAAP net income (loss), adjusted to exclude: stock-based compensation expense; amortization of intangibles; the tax effect of stock-based compensation, amortization of intangibles, restructuring and integration costs, gain on disposal of a business unit and valuation allowance; and certain other non-recurring items, such as restructuring and integration costs accounted for in 2016 and 2017, and gain on disposal of a business unit accounted for in 2017. Non-GAAP net income for the year ended December 31, 2017 and 2016 was $80.2 million and $59.4 million, respectively. The following is a reconciliation of net income (loss) to Non-GAAP net income (in thousands):
 Year Ended December 31,
 2017 2016
Reconciliation of GAAP Net Income (Loss) to Non-GAAP Net Income:   
GAAP net income (loss)$152,858
 $(4,670)
Stock-based compensation100,415
 86,261
Amortization of intangible assets6,639
 6,805
Restructuring and integration costs288
 3,455
Gain on disposal of a business unit(164,779) 
Tax adjustments (1)
(15,255) (32,411)
Non-GAAP net income$80,166
 $59,440
(1)Includes tax effects of stock-based compensation, amortization of intangibles, restructuring and integration costs, gain on disposal of a business unit and valuation allowance.
Critical Accounting Policies and Estimates
Our consolidated financial statements are prepared in accordance with GAAP. The preparation of these consolidated financial statements requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue, expenses and related disclosures. We evaluate our estimates and assumptions on an ongoing basis. Our estimates and assumptions are based on historical experience and various other assumptions that we believe to be reasonable under the circumstances. Our actual results could differ from those estimates.
We believe that the assumptions and estimates associated with revenue recognition, website and internal-use software development costs, the incremental borrowing rate used in adopting the new leasing standard, business combinations, allowance for doubtful accounts, income taxes and stock-based compensation expense have the greatest potential impact on our consolidated financial statements. Therefore, we consider these to be our critical accounting policies and estimates. For further information on these and our other significant accounting policies, see Note 2,"Summary of Significant Accounting Policies," of the Notes to Consolidated Financial Statements included elsewhere in this Annual Report.  

Results of Operations
The following tables set forth our results of operations for the periods indicated as a percentage of net revenue for those periods.2019, 2018 and 2017 (in thousands, except percentages). The period-to-period comparison of financial results is not necessarily indicative of future results.

Year Ended December 31,$ Change
% Change(1)
2019201820172019
vs.
2018
2018
vs.
2017
2019
vs.
2018
2018
vs.
2017
Consolidated Statements of Operations Data:
Net revenue by product:
Advertising$976,925  $907,487  $775,678  $69,438  $131,809  %17 %
Transactions12,436  13,694  60,251  (1,258) (46,557) (9)%(77)%
Other services24,833  21,592  14,918  3,241  6,674  15 %45 %
Total net revenue$1,014,194  $942,773  $850,847  $71,421  $91,926  %11 %
Costs and expenses:
Cost of revenue (exclusive of depreciation and amortization shown separately below)$62,410  $57,872  $70,518  $4,538  $(12,646) %(18)%
Sales and marketing500,386  483,309  437,424  17,077  45,885  %10 %
Product development230,440  212,319  175,787  18,121  36,532  %21 %
General and administrative136,091  120,569  109,707  15,522  10,862  13 %10 %
Depreciation and amortization49,356  42,807  41,198  6,549  1,609  15 %%
Restructuring and integration cost—  —  288  —  (288) 
NM(2)
(100)%
Gain on disposal of a business unit—  —  (163,697) —  163,697  
NM(2)
(100)%
Total costs and expenses978,683  916,876  671,225  61,807  245,651  %37 %
Income from operations35,511  25,897  179,622  9,614  (153,725) 37 %(86)%
Other income, net14,256  14,109  4,864  147  9,245  %190 %
Income before income taxes49,767  40,006  184,486  9,761  (144,480) 24 %(78)%
Provision for (benefit from) income taxes8,886  (15,344) 31,491  24,230  (46,835) (158)%(149)%
Net income$40,881  $55,350  $152,995  $(14,469) $(97,645) (26)%(64)%
(1) Percentage changes are calculated based on rounded numbers and may not recalculate exactly due to rounding.
 Year Ended December 31,
 2017 2016 2015
 (as a percentage of net revenue)
Consolidated Statements of Operations Data:     
Net revenue by product:     
Advertising91 % 90 % 86 %
Transactions7
 9
 8
Other services2
 1
 
Brand advertising
 
 6
Total net revenue100 % 100 % 100 %
Costs and expenses:     
Cost of revenue (exclusive of depreciation and amortization shown separately below)8
 8
 9
Sales and marketing52
 55
 55
Product development21
 19
 20
General and administrative12
 14
 15
Depreciation and amortization5
 5
 5
Restructuring and integration cost
 
 
Gain on disposal of a business unit(19)    
Total costs and expenses79
 101
 104
Income (loss) from operations21
 (1) (4)
Other income, net
 
 
Income (loss) before income taxes21
 (1) (4)
Provision for income taxes(3) 
 (2)
Net income (loss)18% (1)% (6)%
(2) Percentage change is not meaningful.
Years Ended December 31, 2017, 20162019, 2018 and 20152017
Net Revenue
We generate revenue from our advertising products, transactions, other services and, through the end of 2015, brand advertising.
Advertising. We generate advertising revenue from the sale of our advertising programs, which consist ofproducts — including enhanced listing pages and performance and impression-based advertising in search results and elsewhere on our website and mobile app.platform — to businesses of all sizes, from single-location local businesses to multi-location national businesses. Advertising revenue also includes revenue generated from the resale of our advertising products by certain partners and monetization of remnant advertising inventory through third-party ad networks.
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The increase in advertising revenue in 2019 compared to 2018 was primarily due to growth in the number of paying advertiser locations, improved local customer retention and increased revenue from existing multi-location customers. The growth in paying advertiser locations on the local business side resulted from stronger sales force productivity. The improvements in retention were driven by delivering more value to local customers through the efficiency of our advertising auction system and our ad targeting. Our new multi-location advertising products and larger multi-location sales force drove the increase in revenue from multi-location customers, particularly from more tenured national customers.
The increase in 2018 compared to 2017 was primarily due to a significant increase in the number of paying advertising accounts, which was driven by the sale of non-term contracts and the expansion of our local sales force.
The growth in both periods primarily consisted of sales of CPC advertising and a majority of ad clicks were delivered on mobile in both years.
We expect our advertising revenue to continue to increase as we pursue initiatives to expand our multi-location business, increase sales force focuses on both increasing the number of paying advertising accountsproductivity and grow revenue generated from existing advertisers.improve customer retention.
Transactions. We generate revenue from various transactions with consumers, includingprimarily through transactions placed through our partner integrations, the sale of Yelp Deals and Gift Certificates and, through October 10, 2017, Yelp Eat24 transactions. Following our sale of Eat24 to Grubhub on October 10, 2017, we generate revenue from transactions placed through the Grubhub restaurant network, including Eat24 restaurants, that originate on Yelp pursuant to our partnership agreement with Grubhub.

integrations. Our partnership integrations are primarily revenue-sharing arrangements that provide consumers with the ability to complete food ordering and delivery transactions order flowers and book spa and salon appointments, among others, through third parties directly on Yelp. We earn a fee for acting as an agent for transactions placed through these integrations, which we record on a net basis and include in revenue upon completion of a transaction.

The decrease in transactions revenue in 2019 compared to 2018 was primarily due to a decrease in fees earned from Grubhub for processing credit card transactions related to Grubhub orders that originated on Yelp. Over the transition period following its acquisition of Eat24 from us in October 2017, Grubhub increasingly processed the credit card transactions related to such orders directly, thereby reducing the fees it paid us to process them on its behalf. Excluding the processing fees earned from Grubhub orders during the transition, transactions revenue from our revenue-sharing arrangements increased in 2019 compared to 2018.
The decrease in transactions revenue in 2018 compared to 2017 was due to the sale of Eat24. Prior to the completion of our sale, of Eat24, we generated revenue from our Yelp Eat24 business through arrangements with restaurants in which restaurants paypaid a commission percentage fee on orders placed through the Yelp Eat24 platform, which we recorded on a net basis. Following the completion of the sale, we no longer recognize revenue from Yelp Eat24 as a standalone product. Instead, under our partnership agreement with Grubhub, weproduct and instead earn fees on food orders placed through the Grubhub restaurant network including Eat24 restaurants, that originate on the Yelp Platform. Yelp.
We expect the revenue generated under the Grubhub arrangement to continue to be lower than the revenue previously generated by Yelp Eat24 for the foreseeable future, particularly before the remainderamount of the Grubhub restaurant network is fully integrated onto our platform, which is currently targeted to occur by mid-2018. Accordingly, our sale of Eat24 has resulted in a reduction in our transactions revenue and slowing of our total net revenue growth following the sale.in 2020 to remain consistent with 2019.


Yelp Deals allow merchants to promote themselves and offer discounted goods and services on a real-time basis to consumers directly on our website and mobile app. We earn a fee on Yelp Deals for acting as an agent in these transactions, which we record on a net basis and recognize as revenue upon a consumer’s purchase of a deal. Gift Certificates allow merchants to sell full-priced gift certificates directly to consumers through their business listing pages. We earn a fee based on the amount of the Gift Certificate sold, which we record on a net basis and recognize as revenue upon a consumer’s purchase of the Gift Certificate.
Other Services. We generate revenue through our subscription services, which include our Yelp Reservations, Yelp Waitlist and Yelp Nowait products, the Yelp WiFi Marketing analytics platform, licensing payments for access to Yelp dataother subscription products. We also generate revenue through our Yelp Knowledge program, andwhich provides access to Yelp data for a licensing fee, as well as other non-advertising related partnerships.
Brand Advertising. Through the end of 2015, we generated revenue from brand advertising through the sale of display advertisements and brand sponsorships to national brands. We phased out these products to focus on our core strength of local advertising.
The following table provides a breakdown of our netincreases in other services revenue for the periods indicated (dollars in thousands):
       
2016 to
2017
 %
 
2015 to
2016
 %
 Year Ended December 31, Change Change
 2017 2016 2015    
Net revenue by product:         
Advertising$771,644
 $645,241
 $471,416
 20% 37%
Transactions60,251
 62,495
 43,854
 (4) 43
Other services14,918
 5,333
 3,429
 180 56
Brand advertising
 
 31,012
  (100)
Total net revenue$846,813
 $713,069
 $549,711
 19% 30%
Percentage of total net revenue by product:         
Advertising91% 90% 86%    
Transactions7
 9
 8
    
Other services2
 1
 
    
Brand advertising
 
 6
    
Total net revenue100% 100% 100%    
During 2017, 20162019 and 2015, we focused on revenue growth related to our local advertiser customer base. Total net revenue increased $133.7 million, or 19%, in 20172018 compared to 2016,2018 and $163.4 million, or 30%, in 2016 compared to 2015.
Advertising revenue increased $126.4 million, or 20%, in 2017, compared to 2016, and $173.8 million, or 37%, in 2016 compared to 2015. The increase in both periods wasrespectively, were primarily due to a significant increaseincreases in the number of customers purchasing advertising plans as weour subscription products driven by our expanded ourYelp Reservations and Yelp Waitlist sales force, to reach more businesses. The growth in both periods was driven primarily by purchases of cost-per-click advertising. In each of 2017, 2016 and 2015, a majority of ad clicks were delivered on mobile.
Our transactions revenue decreased $2.2 million, or 4%, in 2017 compared to 2016, and $18.6 million, or 43%, in 2016 compared to 2015. The decrease in 2017 was a result of our sale of Eat24 to Grubhub in October 2017, as we no longer recognized revenue from transactions from Yelp Eat24. The increase in 2016 compared to 2015 was primarily the result of increased transactions from Yelp Eat24, which was acquired in February 2015.
Our other services revenue increased $9.6 million, or 180%, in 2017 compared to 2016, and $1.9 million, or 56%, in 2016 compared to 2015. The increase in 2017 was primarily due to the acquisitions of Nowait and Turnstyle as well as increased revenue from Yelp Reservations. The increase in 2016 compared to 2015 was primarily due to increases in revenue from our Yelp Reservations.
AsKnowledge program mainly due to an increase in the number of the beginning of 2016, we no longer offer brand advertising products. As a result, we generated no brand advertising revenue in 2017 or 2016.partnerships.
Cost of Revenue (exclusive of depreciation and amortization)
Our cost of revenue consists primarily of credit card processing fees weband website infrastructure expense, which includes website hosting costs and employee costs (including stock-based compensation expense) for ourthe infrastructure teams related to the operation ofresponsible for operating our website and mobile app. Itapp, and excludes depreciation and amortization expense. Cost of revenue also includes third-party advertising fulfillment costs, confirmation services costs associated with Yelp Reservations Yelp Nowait and Yelp WiFi Marketing,Waitlist, confirmation and delivery services associated with the fulfillment of orders placed through Yelp Eat24 prior to its sale, as well as video production costs for our advertising customers. Following our sale of Eat24 in October 2017, there was an initial reduction in our cost of revenue associated with credit card transactions,customers prior to mid-2018.

as well as confirmation and delivery services. We expect cost of revenue associated with our advertising customers toThe increase in 2018 as we increase the number of customers, offset by a reduction in cost of revenue associated with our transactions business as a resultin 2019 was primarily attributable to:
an increase of our disposal of Eat24.
       2016 to
2017 %
 2015 to
2016 %
 Year Ended December 31, Change Change
 2017 2016 2015    
Cost of revenue$70,518
 $60,363
 $51,015
 17% 18%
Percentage of net revenue8% 8% 9%    
Cost of revenue increased $10.2 million, or 17%, in 2017 compared to 2016, and $9.3 million, or 18%, in 2016 compared to 2015. Website infrastructure expense increased $5.4 million and $1.0$3.7 million in 2017advertising fulfillment costs primarily through third-party advertising networks; and 2016, respectively, which primarily consists
46

an increase in the number of visitors to, and increased transactions completed on, our website compared to the prior year, as well as increased headcount for personnel supporting the website infrastructure. The increase in website infrastructure expense in 2016 compared to 2015 was comparatively less than that of 2017 compared to 2016$3.0 million due to reduced server hosting costs achieved from improved pricing from key website hosting vendors.
Cost of revenue also increased by $3.1 million and $0.2 million in 2017 and 2016, respectively, compared to the prior year periods, as a result of increases in confirmation servicesthe use of our website and third-party food delivery costs. The increase in 2017 was due to an increase in the number of Yelp Eat24 transactions, and increased confirmation services expenses associated with Yelp Reservations, as well as Yelp Nowait and Yelp WiFi Marketing following our acquisitionsemployees supporting the website infrastructure.
These increases were partially offset by a decrease of Nowait and Turnstyle. Additionally, cost of revenue increased in 2017 and 2016 as a result of increases of $2.4$0.7 million and $6.9 million, respectively, in merchant fees related to credit card transactions due to growth in advertising and transactions revenue. The rate of increase in these costs in 2017 was lower than the increase in 2016 as a result of the decline in transactions revenue following the sale of Yelp Eat24 in October 2017.
The decrease in 2018 was primarily attributable to:
a decrease of $6.8 million in merchant fees related to credit card transactions as a result of the decline in transactions revenue following the sale of Eat24 in October 2017, and the slower growth ratepartially offset by an increase in merchant fees related to credit card transactions as a result of processing more payments from advertisers in connection with an increase in advertising revenue that year. In 2017,revenue;
a decrease of $4.7 million in confirmation services and third-party food delivery costs primarily due to the decline in food ordering fulfillment costs following the sale of Eat24, partially offset by an increase in confirmation services associated with Yelp Reservations and Yelp Waitlist; and
a decrease of $3.8 million in set up and creative design costs, decreasedprimarily associated with video production costs as a result of our transition to selling non-term advertising contracts, when we discontinued video production services for our customers.
These decreases were partially offset by $0.7an increase of $2.7 million primarilyin website infrastructure expense due to a decreaseincreases in video production costs. In 2016, set upthe use of our website and creative design costs increased by $1.2 million due to greater demand by businesses for video on their business listing pages.in employees supporting the website infrastructure.
Sales and Marketing
Our sales and marketing expenses primarily consist of employee costs (including incentive compensation expensesales commission and stock-based compensation expense)expenses) for our sales and marketing employees. In addition, salesSales and marketing expenses also include business and consumer acquisition marketing, community management, branding and advertising costs, as well as allocated facilities and other supporting overhead costs.
Following our disposal of Eat24 to GrubhubThe increase in October 2017, we ceased marketing activities related to Yelp Eat24 and over 300 Yelp Eat24 sales and marketing employees transferred to Grubhub. While we have redeployed the remaining sales employees and resources previously associated with Eat24 within our organization, the Eat24 sale resulted in an initial reduction in our sales and marketing expenses. However, we expect our sales and marketing expenses in 2019 was primarily attributable to continuean increase of $31.8 million in employee costs resulting from an increase in sales commission expenses due to improved sales team productivity and, to a lesser extent, from increased salary costs driven by higher multi-location sales teams headcount and a larger share of tenured sales representatives throughout our sales organization. The increase in 2019 was partially offset by a decrease of $15.8 million in marketing and advertising costs primarily due to our continued efforts to optimize our marketing spend, particularly as we expand our communities,Yelp Reservations and Yelp Waitlist products drove consumer usage, which allowed us to reduce our reliance on consumer marketing.
The increase the number of advertising and subscription accounts and continue to build the Yelp brand in the United States and Canada. We expect the majority of sales and marketing expense increases for the foreseeable future to be related to hiring sales employees, as well as to costs incurred with various third-party media outlets and other advertising channels.
       2016 to
2017 %
 2015 to
2016 %
 Year Ended December 31, Change Change
 2017 2016 2015    
Sales and marketing$438,643
 $382,854
 $301,764
 15% 27%
Percentage of net revenue52% 55% 55%    
Sales and marketing expenses increased $55.8 million, or 15%, in 2017 compared to 2016, and $81.1 million, or 27%, in 2016 compared 2015. The increases in 2017 and 2016 were2018 was primarily attributable to $42.8an increase of $48.7 million and $48.5 million, respectively, in additional salaries benefits, travel and other related expensesemployee costs resulting from increases inhigher sales headcount including increases in stock-based compensation expenseand an increase of $1.0$10.6 million and $5.1 million, respectively, as we expanded our sales organization to increase the number of paying advertising accounts and grow revenue from existing customers in the United States and Canada. We also experienced increases in facilities and other overhead allocations of $6.1 million and $10.0 million in 2017 and 2016, respectively, as we leased additional office space and incurred additional overhead costs for our expanding headcount. AsThe increase in 2018 was partially offset by a resultdecrease of our increases in net

revenue, our commission expenses increased by $4.6 million and $7.8$13.4 million in 2017 and 2016, respectively. In addition, as a result of ongoing business and consumer marketing campaigns, marketing and advertising costs increased by $2.3 million and $14.8 milliondue to the cessation of Yelp Eat24 marketing activities following our sale of Eat24 in October 2017 and, 2016, respectively.to a lesser extent, decreases in Yelp-related marketing and advertising costs.
Sales and marketing as a percentage of net revenue was 49% in 2019 and 51% in 2018. We expect sales and marketing expenses to increase again in 2020 as the tenure and channel mix of our sales force changes and we continue to invest in marketing, though we expect these expenses to decrease as a percentage of net revenue. We expect overall sales headcount to be flat in 2020 compared to 2019, with growth in our multi-location sales team offsetting lower local sales headcount as we emphasize the higher-margin sales channel.
Product Development
Our product development expenses primarily consist of employee costs (including stock-based compensation expense)expense, net of capitalized employee costs associated with capitalized website and internal-use software development) for our engineers, product management and information technology personnel.corporate infrastructure employees. In addition, product development expenses include outside services and consulting costs, as well as allocated facilities and other supporting overhead costs. We believe that continued investment
47

The increases in features, software development tools and code modification is important to attaining our strategic objectives and, as a result, we expect product development expenses to continue to increase for the foreseeable future. Although our sale of Eat24 will reduce our product development expenses associated with the Yelp Eat24 product, we have redeployed the associated internal resources elsewhere within our organizationin 2019 and do not expect the sale to have a material impact on our overall product development expenses as a result.
       2016 to
2017 %
 2015 to
2016 %
 Year Ended December 31, Change Change
 2017 2016 2015    
Product development$175,787
 $138,549
 $107,786
 27% 29%
Percentage of net revenue21% 19% 20%    
Product development expenses increased $37.2 million, or 27%, in 2017 compared to 2016, and $30.8 million, or 29%, in 2016 compared to 2015. The increases in 2017 and 20162018 were primarily attributable to $30.4to:
increases of $15.6 million and $27.9$32.1 million, respectively, in additional salaries and benefitsemployee costs associated with an increase inincreased headcount including to support more research and development activities, primarily for new and enhanced business-owner products as well as, to a lesser extent, enhancements to the consumer experience; and
increases in stock-based compensation expense (net of capitalized stock-based compensation expense) of $11.0$2.6 million and $12.9$3.8 million, respectively. In addition, we experienced increasesrespectively, in facilities and other overhead allocations of $6.0 million and $5.0 million in 2017 and 2016, respectively, as we leased additional office space and incurred additional overhead costs for our expanding headcount.
General and Administrative
Our general and administrative expenses primarily consist of employee costs (including stock-based compensation expense) for our executive, finance, user operations, legal, human resourcespeople operations and other administrative employees. Our general and administrative expenses also include bad debt expenses, outsideprovision for doubtful accounts, consulting legal and accounting services,costs, as well as facilities and other supporting overhead costs. We expect bad debt expenses to
The increase as our advertising revenue continues to grow, and our otherin general and administrative expenses in 2019 was primarily attributable to $10.3 million in additional employee costs, should alsoconsulting costs, and facilities and other overhead costs required to support the growth of the business, as well as $7.1 million in fees related to shareholder activism. This increase was partially offset by a decrease in the provision for the foreseeable future as we continuedoubtful accounts of $2.0 million due to expand our business. We do not expect our disposal of Eat24 to have a material impact on ouran improvement in collection rates from advertising customers.
The increase in general and administrative costs.
       2016 to
2017 %
 2015 to
2016 %
 Year Ended December 31, Change Change
 2017 2016 2015    
General and administrative$105,673
 $97,481
 $80,866
 8% 21%
Percentage of net revenue12% 14% 15%    
General and administrative expenses increased $8.2 million, or 8%, in 2017 compared to 2016, and $16.6 million, or 21%, in 2016 compared to 2015. The increases in 2017 and 2016 were2018 was primarily attributable to $5.7$7.3 million and $12.1 million, respectively, in additional salaries, benefits, travelemployee costs and related expenses associated with an increase in headcount, including increases in stock-based compensation expenseprovision for doubtful accounts of $0.6 million and $6.1 million, respectively. In 2017, the increase was also driven by an$3.6 million. The increase in one-time bonuses incurred in the year. Bad debt expense increased by $1.0 million in 2017 and $5.6 million in 2016provision for doubtful accounts was due to continued growth in advertising revenue. The rate of increaserevenue and the shift in bad debt expense in 2017 was less than that of 2016our advertiser base toward newer advertisers, who are typically associated with higher provision for doubtful accounts.
Adjusting for the fees related to shareholder activism, we expect general and administrative expenses as a resultpercentage of improved collections rates from advertising customers.
In 2017, the use of outside consultants increased by $1.4 million as we investednet revenue in our systems and support for the growth of the business. In 2016, there was a decrease in consulting costs of $2.6 million due2020 to decreased reliance on outside consultants. Facilities and other related allocations in 2017 wereremain consistent with those in the prior year. We experienced an increase in facilitiesgeneral and other overhead allocations of $1.5 million in 2016,administrative expenses as a resultpercentage of the increasenet revenue in headcount.2019, which was 13%.
Depreciation and Amortization

Depreciation and amortization expensesexpense primarily consistconsists of depreciation on computer equipment, software, leasehold improvements, capitalized website and software development costs, and amortization of purchased intangible assets. We expect
The increases in depreciation expensesand amortization expense in 2019 and 2018 were primarily attributable to increase for the foreseeable futureincreases in depreciation associated with capitalized website and internal use software development costs, as we continueinvested in new products for business owners and consumers as well as leasehold improvements related to expand our technology infrastructure, and lease additional office space. Amortization expense is likely to be lower for the foreseeable future as a result of the disposition of intangible assets in our sale of Eat24 to Grubhub in October 2017.
       2016 to
2017 %
 2015 to
2016 %
 Year Ended December 31, Change Change
 2017 2016 2015    
Depreciation and amortization$41,198
 $35,346
 $29,604
 17% 19%
Percentage of net revenue5% 5% 5%    
Depreciation and amortization expenses increased $5.9 million, or 17%, in 2017 compared to 2016, and $5.7 million, or 19%, in 2016 compared to 2015. These increases were primarily the result of our investments in expanding our technology infrastructure and capital assets to support ourleased facilities. The increase in headcount across the organization. Depreciation and2018 was partially offset by a decrease in amortization expensesexpense related to our property, equipment and capitalized website and software development costs increased $6.1 million and $5.5intangible assets of $3.1 million in 2017 and 2016, respectively.connection with the sale of Eat24.
Restructuring and Integration
       2016 to
2017 %
 2015 to
2016 %
 Year Ended December 31, Change Change
 2017 2016 2015    
Restructuring and integration$288
 $3,455
 $
 (92)% 
Percentage of net revenue
 ���
 
    
On November 2, 2016, we announced plans to significantly reduce sales and marketing activities in markets outside of the United States and Canada. The restructuring plan was substantially completed by December 31, 2016. 2017.
We incurred $0.3 million and $3.5 million fordid not incur any costs related to this plan in the years ended December 31, 20172019 and 2016, respectively,2018. We incurred $0.3 million in restructuring and integration costs associated with this plan in the years ended December 31, 2017 related to severance costs for affected employees. No further expense forWe do not expect to incur any additional expenses related to this plan is expected after December 31, 2017.in the future. No goodwill, intangibles or other long lived assets were impaired as a result of the restructuring plan.
Gain on Disposal of a Business Unit
       2016 to
2017 %
 2015 to
2016 %
 Year Ended December 31, Change Change
 2017 2016 2015    
Gain on disposal of a business unit$164,779
 $
 $
 —% —%
Percentage of net revenue19% 
 
    

Our disposalsale of Eat24 to Grubhub on October 10, 2017 resulted in a $164.8$163.7 million pre-tax gain. The gain recorded was calculated as proceeds from the disposal, offset by the net assets of Eat24 as of the disposal date, and costs specifically incurred as a result of the sale.
48

Other Income, Net
Other income, net consists primarily of the interest income earned on our cash, cash equivalents and marketable securities, and foreign exchange gains and losses.

       2016 to
2017 %
 2015 to
2016 %
 Year Ended December 31, Change Change
 2017 2016 2015    
Other income$4,864
 $1,694
 $386
 187% 339%
Percentage of net revenue
 
 
    
Other income, net increased by $3.2 millionremained relatively consistent in 20172019 compared to 2016, and $1.3 million2018, primarily due to higher rates of interest earned on marketable investments offset by a decrease in 2016cash held in interest bearing accounts as a result of the stock repurchase program.
The increase in 2018 compared to 2015,2017 was primarily driven by an increaseincreases in interest income earned on marketable investments and cash held in interest-bearing accounts.accounts, particularly due to proceeds received on the sale of Eat24 in October 2017. The increase in 2018 was also due to investing a greater portion of our excess cash in marketable securities.
Provision for (Benefit from) Income Taxes
Provision for (benefit from) income taxes consists of federal and state income taxes in the United States and income taxes in certain foreign jurisdictions, deferred income taxes reflecting the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes, generation of income tax credits and the realization of net operating loss carryforwards.
       2016 to
2017 %
 2015 to
2016 %
 Year Ended December 31, Change Change
 2017 2016 2015    
Provision for income taxes$(31,491) $(1,385) $(11,962) 2,174% (88)%
Percentage of net revenue(3)%  % (2)%    
In 2017, we recognizedThe increase in the provision for income tax expense of $31.5 million,taxes in 2019 (from a recorded benefit in 2018 to a recorded provision in 2019) was primarily relateddue to the income tax on the gain on disposal of Eat24, offset by the utilization of net operating losses and tax credits and the corresponding release of our valuation allowance. Incomeallowance in 2018,which was previously recorded against certain deferred tax expense increased $30.1 millionassets. The decrease in the provision for income taxes in 2018 (from a recorded provision in 2017 compared to 2016a recorded benefit in 2018) was primarily due to the gain on the disposal of Eat24 in 2017, partially offset by the release of our valuation allowance in 2018.

Non-GAAP Financial Measures
Our consolidated financial statements are prepared in accordance with GAAP. However, we have also disclosed below EBITDA and adjusted EBITDA, which are non-GAAP financial measures. We have included EBITDA and adjusted EBITDA because they are key measures used by our management and board of directors to understand and evaluate our operating performance and trends, to prepare and approve our annual budget and to develop short- and long-term operational plans. In particular, the exclusion of certain expenses in calculating EBITDA and adjusted EBITDA can provide a useful measure for period-to-period comparisons of our primary business operations. Accordingly, we believe that EBITDA and adjusted EBITDA provide useful information to investors and others in understanding and evaluating our operating results in the same manner as our management and board of directors.
EBITDA and adjusted EBITDA have limitations as analytical tools, and you should not consider them in isolation or as substitutes for analysis of our results as reported under GAAP. In particular, EBITDA and adjusted EBITDA should not be viewed as substitutes for, or superior to, net income (loss) prepared in accordance with GAAP as a measure of profitability or liquidity. Some of these limitations are:
although depreciation and amortization are non-cash charges, the assets being depreciated and amortized may have to be replaced in the future, and EBITDA and adjusted EBITDA do not reflect all cash capital expenditure requirements for such replacements or for new capital expenditure requirements;
EBITDA and adjusted EBITDA do not reflect changes in, or cash requirements for, our working capital needs;
adjusted EBITDA does not consider the potentially dilutive impact of equity-based compensation;
EBITDA and adjusted EBITDA do not reflect the impact of the recording or release of valuation allowances or tax payments that may represent a reduction in cash available to us;
adjusted EBITDA does not take into account any income or costs that management determines are not indicative of ongoing operating performance, such as restructuring and integration costs in 2016 and 2017, gain on disposal of a business unit. Income tax expense decreased $10.6 millionunit in 2016 compared2017, and fees related to 2015 primarily due to the valuation allowance recordedshareholder activism in 2015 against certain deferred tax assets.2019; and
It is reasonably possible that within the next 12 months thereother companies, including companies in our industry, may be sufficient positive evidence to release a significant portioncalculate EBITDA and adjusted EBITDA differently, which reduces their usefulness as comparative measures.
49

Because of this valuation allowance would result in the recognition of certain deferred tax assetsthese limitations, you should consider EBITDA and a decrease to income tax expense for the period the release is recorded. The exact timing and amount of the valuation allowance release are subject to change on the basis of theadjusted EBITDA alongside other financial performance measures, including net income that we are able to actually achieve. We will continue to evaluate the possible release of valuation allowance on a quarterly basis.
Quarterly Results of Operations(loss), and Other Data
our other GAAP results. The following tables set forth our unaudited quarterly consolidated statements of operations data for each of the eight quarters in the period ended December 31, 2017 (in thousands, except per share data). We alsobelow present other financial and operational data and a reconciliationreconciliations of net income (loss) to EBITDA and adjusted EBITDA. We have prepared this quarterly data on a consistent basis withEBITDA, the audited consolidatedmost directly comparable GAAP financial statements includedmeasure in this Annual Report. In the opinion of management, the quarterly financial information reflects all necessary adjustments, consisting only of normal recurring adjustments, necessaryeach case, for a fair presentation of this data. This information should be read in conjunction with the audited financial statements and related notes included elsewhere in this Annual Report. The results of historical periods are not necessarily indicativeeach of the resultsperiods indicated.

EBITDA. EBITDA is a non-GAAP financial measure that we calculate as net income (loss), adjusted to exclude: (benefit from) provision for income taxes; other income (expense), net; and depreciation and amortization.
Adjusted EBITDA. Adjusted EBITDA is a non-GAAP financial measure that we calculate as net income (loss), adjusted to exclude: provision for (benefit from) income taxes; other income, net; depreciation and amortization; stock-based compensation expense; and, in certain periods, certain other income and expense items. For 2019, 2017 and 2016, these other income and expense items consisted of operations for any future period.

 Quarter Ended
 Dec 31, 2017 Sep 30, 2017 Jun 30, 2017 Mar 31, 2017 Dec 31, 2016 Sep 30, 2016 Jun 30, 2016 Mar 31, 2016
Consolidated Statements of
Operations Data:
             
  
Net revenue by product         
      
Advertising$208,398
 $199,595
 $186,602
 $177,049
 $176,547
 $168,950
 $156,697
 $143,047
Transactions5,227
 18,524
 18,435
 18,065
 16,568
 15,910
 15,518
 14,499
Other services4,621
 4,261
 3,827
 2,209
 1,681
 1,372
 1,213
 1,067
Total net revenue$218,246
 $222,380
 $208,864
 $197,323
 $194,796
 $186,232
 $173,428
 $158,613
Costs and expenses:               
Cost of revenue (exclusive of depreciation and amortization shown separately below)(1)
$16,236
 $19,312
 $18,056
 $16,914
 $15,604
 $14,594
 $15,087
 $15,078
Sales and marketing(1)
111,084
 113,041
 105,232
 109,286
 93,550
 99,274
 94,402
 95,628
Product development(1)
47,994
 45,834
 42,088
 39,871
 36,860
 36,369
 33,098
 32,222
General and administrative(1)
26,703
 26,694
 25,961
 26,315
 27,372
 24,876
 23,464
 21,769
Depreciation and amortization9,729
 10,656
 10,662
 10,151
 9,434
 9,159
 8,564
 8,189
Restructuring and integration1
 35
 21
 231
 3,455
 
 
 
Gain on disposal of a business unit(164,779) 
 
 
 
 
 
 
Total costs and expenses$46,968
 $215,572
 $202,020
 $202,768
 $186,275
 $184,272
 $174,615
 $172,886
Income (loss) from operations$171,278
 $6,808
 $6,844
 $(5,445) $8,521
 $1,960
 $(1,187) $(14,273)
Other income (expense), net1,897
 1,371
 864
 732
 742
 327
 367
 258
Income (loss) before income taxes$173,175
 $8,179
 $7,708
 $(4,713) $9,263
 $2,287
 $(820) $(14,015)
(Provision for) benefit from income taxes(31,074) (232) (118) (67) (1,000) (217) 1,269
 (1,437)
Net income (loss) attributable to
common stockholders
$142,101
 $7,947
 $7,590
 $(4,780) $8,263
 $2,070
 $449
 $(15,452)
Net income (loss) per share attributable
to common stockholders:
               
Basic$1.71
 $0.10
 $0.09
 $(0.06) $0.10
 $0.03
 $0.01
 $(0.20)
Diluted$1.60
 $0.09
 $0.09
 $(0.06) $0.10
 $0.02
 $0.01
 $(0.20)
Weighted-average shares used to compute net income (loss) per share attributable to common stockholders:               
Basic83,264
 82,259
 80,996
 79,843
 78,851
 77,521
 76,467
 75,884
Diluted89,064
 87,433
 84,860
 79,843
 84,364
 82,917
 79,280
 75,884
(1)Includes non-cash stock-based compensation expense as follows (in thousands):
 Quarter Ended
 Dec 31, 2017 Sep 30, 2017 Jun 30, 2017 Mar 31, 2017 Dec 31, 2016 Sep 30, 2016 Jun 30, 2016 Mar 31, 2016
Stock-based compensation               
Cost of revenue$1,079
 $993
 $957
 $981
 $874
 $764
 $407
 $401
Sales and marketing6,666
 7,305
 7,261
 6,868
 6,722
 7,191
 6,843
 6,342
Product development12,851
 11,976
 11,245
 11,208
 10,595
 9,284
 8,413
 8,030
General and administrative4,811
 5,035
 5,902
 5,277
 5,673
 5,321
 5,063
 4,337
Total stock-based compensation$25,407
 $25,309
 $25,365
 $24,334
 $23,864
 $22,560
 $20,726
 $19,110
(i) certain fees related to shareholder activism, (ii) gain on disposal of a business unit and restructuring and integration costs, and (iii) restructuring and integration costs, respectively.
The following table presents other financial and operational data (dollars in thousands):

 Quarter Ended
 Dec 31, 2017 Sep 30, 2017 Jun 30, 2017 Mar 31, 2017 Dec 31, 2016 Sep 30, 2016 Jun 30, 2016 Mar 31, 2016
Other Financial and Operational Data(1):
               
Reviews148,298
 142,036
 134,591
 127,478
 121,022
 115,259
 108,251
 101,564
Desktop Unique Visitors76,748
 83,592
 82,998
 78,167
 67,888
 71,409
 73,406
 77,433
Mobile Web Unique Visitors64,221
 73,508
 74,101
 73,192
 65,351
 72,040
 69,327
 68,551
App Unique Devices28,845
 30,162
 27,987
 25,827
 24,073
 24,900
 23,010
 21,186
Claimed Local Business Locations4,189
 3,975
 3,753
 3,559
 3,363
 3,192
 3,010
 2,834
Paying Advertising Accounts163
 155
 148
 139
 135
 132
 125
 119
Adjusted EBITDA$41,636
 $42,808
 $42,892
 $29,271
 $45,274
 $33,679
 $28,103
 $13,026
(1)For information on how we define these operational and other metrics, see “—Key Metrics.”
The following table presentsis a reconciliation of net income (loss) to EBITDA and adjusted EBITDA (in thousands):
Year Ended December 31,
2019201820172016
2015(1)
Reconciliation of Net Income (Loss) to EBITDA and Adjusted EBITDA: 
Net income (loss)$40,881  $55,350  $152,995  $(1,711) $(32,900) 
Provision for (benefit from) income taxes8,886  (15,344) 31,491  1,385  11,962  
Other income, net(14,256) (14,109) (4,864) (1,694) (386) 
Depreciation and amortization49,356  42,807  41,198  35,346  29,604  
EBITDA84,867  68,704  220,820  33,326  8,280  
Stock-based compensation121,512  114,386  100,415  86,261  60,842  
Gain on disposal of a business unit—  — ��(163,697) —  —  
Restructuring and integration costs—  —  288  3,455  —  
Fees related to shareholder activism(2)
7,116  —  —  —  —  
Adjusted EBITDA$213,495  $183,090  $157,826  $123,042  $69,122  
 Quarter Ended
 Dec 31, 2017 Sep 30, 2017 Jun 30, 2017 Mar 31, 2017 Dec 31, 2016 Sep 30, 2016 Jun 30, 2016 Mar 31, 2016
Reconciliation of GAAP net income (loss) to EBITDA and adjusted EBITDA:               
Net income (loss)$142,101
 $7,947
 $7,590
 $(4,780) $8,263
 $2,070
 $449
 $(15,452)
Provision for (benefit from) income taxes31,074
 232
 118
 67
 1,000
 217
 (1,269) 1,437
Other income, net(1,897) (1,371) (864) (732) (742) (327) (367) (258)
Depreciation and amortization9,729
 10,656
 10,662
 10,151
 9,434
 9,159
 8,564
 8,189
EBITDA181,007
 17,464
 17,506
 4,706
 17,955
 11,119
 7,377
 (6,084)
Stock-based compensation25,407
 25,309
 25,365
 24,334
 23,864
 22,560
 20,726
 19,110
Gain on disposal of a business unit(164,779) 
 
 
 
 
 
 
Restructuring and integration costs1
 35
 21
 231
 3,455
 
 
 
Adjusted EBITDA$41,636
 $42,808
 $42,892
 $29,271
 $45,274
 $33,679
 $28,103
 $13,026
(1)Amounts for 2015 have not been recast to reflect the adoption of ASC 606.

(2)Recorded within general and administrative expenses on our consolidated statements of operations.

Liquidity and Capital Resources
As of December 31, 2017,2019, we had cash and cash equivalents of $547.9$170.3 million. Cash and cash equivalents consist of cash, money market funds and investments with original maturities of less than three months. Our cash held internationally as of December 31, 20172019 was $6.4$11.2 million. We did not have any outstanding bank loans or credit facilities in place as of December 31, 2017. 2019.
Our investment portfolio comprises highly rated marketable securities, and our investment policy limits the amount of credit exposure to any one issuer. The policy generally requires securities to be investment grade (i.e. rated ‘A’‘A+’ or higher by bond rating firms) with the objective of minimizing the potential risk of principal loss. To date, we have been able to finance our operations and our acquisitions through proceeds from private and public financings, including our initial public offering in March 2012, our follow-on offering in October 2013, cash generated from operations and, to a lesser extent, cash provided by the exercise of employee stock options and purchases under the 2012 Employee Stock Purchase Plan, as amended, (“ESPP”).or ESPP. In addition, on October 10,in the fourth quarter of 2017, we completed our sale of Eat24 to Grubhub and received $252.7 million in cash, with an additional $28.8 million that is currently beingwas held in escrow for an initial 18-month period after closing to secure our indemnification obligations in connection with the sale. The full escrow amount was released to us in April 2019.
Our future capital requirements and the adequacy of available funds will depend on many factors, including those set forth under the heading Risk Factors” in this Annual Report. We believe that our existing cash and cash equivalents, together with any cash generated from operations, will be sufficient to meet our working capital requirements, andour anticipated repurchases of common stock pursuant to our stock repurchase program, payment of taxes related to the net share settlement of equity awards as well as purchases of property, equipment and equipmentsoftware for at least the next 12 months. However, this estimate is based on a number of assumptions that may prove to be wrong and we could exhaust our available cash and cash equivalents earlier than presently anticipated. We may require or otherwise seek additional funds in the next 12 months to respond to business
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challenges, including the need to develop new features and products or enhance existing services, improve our operating infrastructure or acquire complementary businesses and technologies, and, accordingly, we may need to engage in equity or debt financings to secure additional funds.
Amounts deposited with third-party financial institutions exceed the Federal Deposit Insurance Corporation and Securities Investor Protection Corporation insurance limits, as applicable. These cash and cash equivalents could be impacted if the underlying

financial institutions fail or are subjected to other adverse conditions in the financial markets. To date, we have experienced no loss or lack of access to our cash and cash equivalents; however, we can provide no assurances that access to our invested cash and cash equivalents will not be impacted by adverse conditions in the financial markets.
Cash Flows
The following table summarizes our cash flows for the periods indicated (in thousands):
Year Ended December 31,
201920182017
Consolidated Statements of Cash Flows Data:
Net cash provided by operating activities$204,782  $160,187  $167,647  
Net cash provided by (used in) investing activities$124,335  $(164,369) $81,136  
Net cash (used in) provided by financing activities$(491,519) $(207,747) $27,162  
 Year Ended December 31,
 2017 2016 2015
Consolidated Statements of Cash Flows Data:     
Cash provided by operating activities167,647
 126,900
 57,362
Cash provided by (used in) investing activities79,899
 (55,572) (158,682)
Cash provided by financing activities27,162
 29,522
 26,442
Operating Activities. We generated $167.6 million of cash in Cash provided by operating activities in the year ended December 31, 2017,during 2019 was primarily resulting from ourattributable to net income of $152.9$40.9 million and noncash adjustments to net income of $229.0 million, partially offset by a decrease in the net change in operating assets and liabilities of $65.1 million, which included the gain on disposal of Eat24 of $164.8 million, non-cash depreciation and amortization expenses of $41.2 million, non-cash stock-based compensation expense of $100.4 million, and non-cash provision for doubtful accounts and sales returns of $18.4 million. In addition, significant changes in our operating assets and liabilities resulted from the following:
an increase in accounts receivable of $32.1$42.1 million due to an increase in billings for advertising plans, particularly thosefor customers paying in arrears, as well as the timing of payments from these customers;
an increase in prepaid expenses and other assets of $1.3 million;
a decrease in operating lease liabilities of $41.8 million due to operating lease payments made during the year; and
an increase in accounts payable, accrued expenses and other liabilities of $20.1 million, primarily driven by an increase in accrued employee compensation and related costs due to a change in the frequency of pay cycles. This increase was partially offset by a decrease in accrued expenses related to various operating expenses.
Cash provided by operating activities during 2018 was primarily attributable to net income of $55.4 million and noncash adjustments to net income of $165.5 million, partially offset by a decrease in the net change in operating assets and liabilities of $60.7 million, which included the following:
an increase in accounts receivable of $35.7 million due to an increase in billings for advertising plans, particularly for customers billed in-arrears, as well as the timing of payments from these customers;
an increase in prepaid expenses and other assets of $5.2 million, primarily driven by increases in deferred contract costs and tax-related receivables, partially offset by a decrease in non-trade receivables; and
a decrease in accounts payable, accrued expenses and other liabilities of $19.8 million, primarily driven by a decrease in accrued income taxes as a result of income tax payments made in 2018 on taxable income from 2017, which was primarily a result of the gain on disposal of Eat24. This decrease was partially offset by higher accrued compensation costs as a result of increased headcount.
Cash provided by operating activities during 2017 was primarily attributable to net income of $153.0 million, which included the pre-tax gain on disposal of Eat24 of $163.7 million, and noncash adjustments to net income of $0.3 million, which included the following:
an increase in accounts receivable of $36.1 million due to an increase in billings for advertising plans, particularly for customers billed in-arrears, as well as the timing of payments from these customers;
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an increase in prepaid expenses and other assets of $2.6 million, primarily due to an increase in tenant improvement allowance receivable and prepaid licenses; and
an increase in accounts payable, accrued expenses and other liabilities of $52.9$53.0 million, primarily driven by an increase in income taxes payable associated with the gain on disposal of Eat24, accrued bonus and commissions, and various other accrued operating costs and expenses as a result of the growth in our business, offset by a decrease in restaurant revenue share liability as a result of the disposal of Eat24; andEat24.
increase in prepaids and other assets of $1.4 million, primarily due to an increase in tenant improvement allowance receivable and prepaid licenses.
We generated $126.9 million of cash in operatingInvesting Activities. Our primary investing activities induring the year ended December 31, 2016, primarily resulting from our net loss of $4.7 million, which included non-cash depreciation and amortization expenses of $35.3 million, non-cash stock-based compensation expense of $86.3 million and non-cash provision for doubtful accounts and sales returns of $17.3 million. In addition, significant changes in our operating assets and liabilities resulted from the following:
increase in accounts receivable of $31.6 million due to an increase in billings for advertising plans, as well as the timing of payments from these customers;
increase in accounts payable, accrued expenses and other liabilities of $15.3 million, primarily driven by an increase in restaurant revenue share liability, accrued vacation and employee-related expenses, and the timing of invoices and payments to the vendors, particularly marketing-related vendors; and
decrease in prepaids and other assets of $5.7 million, primarily due to the collection of non-trade receivables.
We generated $57.4 million of cash in operating activities in the year ended December 31, 2015, primarily resulting from our net loss of $32.9 million, which included non-cash depreciation and amortization expenses of $29.6 million, non-cash stock-based compensation expense of $60.8 million, non-cash provision for doubtful accounts of $16.8 million and a $20.3 million expense related to a valuation allowance recorded against certain domestic and foreign deferred tax assets. In addition, significant changes in our operating assets and liabilities resulted from the following:
increase in accounts receivable of $25.3 million due to an increase in billings for advertising plans, as well as the timing of payments from these customers;
increase in accounts payable, accrued expenses and other liabilities of $15.9 million related to the growth in our business, increase in restaurant revenue share liability, accrued vacation and employee-related expenses, and the timing of invoices and payments to vendors; and
increase in prepaids and other assets of $22.7 million relating to an increase in prepayments (primarily for marketing and business licenses) and deferred tax benefits.

Investing Activities. Our primary investing activities in the year ended December 31, 20172019 consisted of purchasesmaturities of marketable securities, acquisitions of businesses, the sale of a business unit, purchases of property and equipment to support the ongoing build out of leasehold improvements for our new facilitiesfacility in San Francisco, Washington, D.C. and other locations,, the purchaseupgrading of technology hardware to supportfor our growth in headcountemployees and internally developed software to support website and mobile app development, website operations and our corporate infrastructure. Purchases of property, equipment and software may vary from period to period due to the timing of the expansion of our offices, operations and website and internal-use software and development. We expect our
Cash provided by investing activities during 2019 primarily related to the maturity of $674.1 million of investment in property and equipment, leasehold assetssecurities held-to-maturity and the developmentrelease of softwarean escrow deposit of $28.8 million in 2018 to grow from 2017 levels.
We generated $79.9connection with our sale of Eat24. Cash provided by investing activities was partially offset by purchases of $541.5 million of cashmarketable securities and expenditures of $37.5 million of property, equipment and software, primarily related to investments in website and mobile app development, as well as internal-use software.
Cash used in investing activities during 2018 was primarily attributable to purchases of $751.2 million of marketable securities and expenditures of $45.0 million of property, equipment and software, primarily related to investments in website and mobile app development, as well as internal-use software. Cash used in investing activities was partially offset by the year ended December 31, 2017. maturity of $613.7 million of investment securities held-to-maturity and the sale of $17.9 million of investment securities prior to maturity (refer to Note 4,"Fair Value of Financial Instruments," of the Notes to Consolidated Financial Statements for details regarding the sale of held-to-maturity investment).
Cash provided by investing activities during 2017 primarily related to $252.7 million net cash received for the sale of Eat24 to Grubhub on October 10, 2017 and $264.0 million of maturities of investment securities held-to-maturity. Cash provided by investing was offset by purchases of marketable securities of $354.9 million, purchasesexpenditures of $30.2 million of property, equipment and software, of $15.6 million to support the growth in our business, expendituresprimarily related to investments in website and internally developed software of $14.6 million,mobile app development, as well as internal-use software, our acquisition of Nowait for net cash consideration of $30.8 million, which included intangible assets of $12.7 million, and our acquisition of Turnstyle for net cash consideration of $19.7 million, which included intangible assets of $4.3 million.
WeFinancing Activities. Cash used $55.6 million of cash in investingfor financing activities during the year ended December 31, 2016. Cash used in investing activities primarily related to purchases of marketable securities of $275.0 million, expenditures related to website and internally developed software of $14.2 million, purchases of property, equipment and software of $23.02019 comprised $481.0 million to support the growth inrepurchase shares of common stock pursuant to our business, our investment of $8.0stock repurchase program and $42.8 million in the preferred stock of Nowait and purchases of intangible data licenses of $0.2 million. In addition, as part of our lease agreements for additional office space, we were obligated to deliver additional letters of credit, which resulted in an increase of $0.8 million in restricted cash. Cash used in investing was offset by $265.5 million of maturities of investment securities held-to-maturity.
We used $158.7 million of cash in investing activities during the year ended December 31, 2015. Cash used in investing activities primarilypay taxes related to the $73.4 million cash portionnet share settlement of the purchase price of Eat24, purchases of marketable securities of $246.2 million, expenditures related to website and internally developed software of $11.7 million, purchases of intangible data licenses of $0.6 million and purchases of property, equipment, software and leasehold improvements of $31.1 million to support the growth inequity awards for our business. Cash used in investing wasemployees. These were partially offset by $202.9 million of maturities of investment securities held-to-maturity and the release of restrictions on cash of $1.4 million.
Financing Activities. During the year ended December 31, 2017, we generated $27.2$32.3 million in financing activities, primarily due to net proceeds of $30.0 millioncash generated from the issuance of common stock upon the exercise of stock options and $10.9 million in net proceeds from the sale of common stock under the ESPP.
Cash used in financing activities during 2018 comprised $187.4 million to repurchase shares of common stock pursuant to our stock repurchase program and $50.1 million to pay taxes related to the net share settlement of equity awards for our employees, partially offset by $29.8 million in cash generated from the issuance of common stock upon exercise of stock options and the sale of common stock under the ESPP.
Cash provided by financing activities during 2017 was primarily due to net proceeds of $40.9 million generated from the issuance of common stock upon exercise of stock options and the sale of common stock under the ESPP. Cash provided by financing activities was partially offset by $12.6 million in repurchases of common stock and $1.2 million of taxes paid related to the net share settlement of equity awards for our international employees.
During the year ended December 31, 2016, we generated $29.5 million in financing activities, primarily due to net proceeds of $20.6 million from the issuance of common stock upon the exercise of stock options and $8.9 million in net proceeds from the sale of shares of common stock under the ESPP.
During the year ended December 31, 2015, we generated $26.4 million in financing activities, primarily due to net proceeds of $12.3 million from the issuance of common stock upon the exercise of stock options, $8.9 million in net proceeds from the sale of stock under our ESPP and $6.6 million in excess tax benefits from stock-based award activity.
Stock Repurchase Program
In July 2017, our board of directors authorized a stockthe repurchase program under which we may repurchaseof up to $200 million of our outstanding common stock. During the years ended December 31, 2018 and 2017, we repurchased on the open market and subsequently retired 4,896,003 shares and 302,206 shares, respectively, for aggregate purchase prices of $187.4 million and $12.6 million, respectively. We completed the repurchase of the full $200 million authorization in November 2018.
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On each of November 27, 2018 and February 11. 2019, our board of directors authorized us to repurchase up to an additional $250 million of our outstanding common stock, bringing the amount of repurchases authorized under our stock repurchase program to $700 million. During the year ended December 31, 2019, we repurchased on the open market and subsequently retired 14,190,409 shares for an aggregate purchase price of $481.0 million. On January 15, 2020, our board of directors authorized us to repurchase up to an additional $250 million of our outstanding common stock, bringing the total amount of repurchases authorized under our stock repurchase program to $950 million, of which approximately $269.0 million remains available.
We may purchase shares at our discretion in the open market, in privately negotiated transactions, in transactions structured through investment banking institutions, or a combination of the foregoing. The program is not subject to any time limit and may be modified, suspended or discontinued at any time. The amount and timing of repurchases are subject to a variety of factors, including liquidity, cash flow and market conditions. During the year ended December 31, 2017, we repurchased 302,206 shares on the open market for an aggregate purchase price of $12.6 million and had retired 301,106 of these shares as of December 31, 2017; the remaining treasury shares were subsequently retired in 2018.
We have funded theseall repurchases to date and expect to fund any future repurchases under the stock repurchase program, with cash available on our balance sheet, whichsheet. As a result, we expect that cash used in financing activities will continue to increase the cash used in investing activities.as we make repurchases pursuant to this program.
Net Share Settlement of Equity Awards

In 2017, we began settling the employee tax liabilities associated with the vesting of RSUs through net share withholding for our internationally based employees, rather than selling a portion of the vested shares to cover taxes, as we had previously —previously. In 2018, we expanded this practice of net share settlement for internationalthe vesting of RSUs to all employees. As a result, we paid $42.8 million, $50.1 million and $1.2 million of employee taxes in the years ended December 31, 2019, 2018, and 2017, respectively, out of cash held on our consolidated balance sheet. Although we continued to sell a portion of vested shares to cover such taxes for U.S.-based employees in 2017, we intend to begin net share withholding for them as well in 2018, which will result in an increase in cash used in financing activities in 2018.

Off Balance
Off-Balance Sheet Arrangements
We did not have any off balanceoff-balance sheet arrangements, as defined in Regulation S-K, Item 303(a)(4)(ii) promulgated by the SEC under the Securities Act, in 2017, 20162019, 2018 or 2015.2017.

Contractual Obligations
We lease various office facilities, including our corporate headquarters in San Francisco, California, under operating lease agreements that expire from 20182019 to 2029. The terms of the lease agreements provide for rental payments on a graduated basis. We recognize rent expense on a straight-line basis over the lease periods. We do not have any debt or material capital lease obligations, and all of our property, equipment and software have been purchased with cash. As of December 31, 2017,2019, we had no material long-term purchase obligations outstanding with vendors or third parties other than obligations related to the fit outpurchases of certain leasehold properties. As of December 31, 2017, thewebsite hosting services. The following table summarizes our future minimum payments under non-cancelable operating leases and purchase obligations for equipment and office facilities as of December 31, 2019 (in thousands):
Payments Due by Period
TotalLess Than 1 Year1 – 3 Years3 – 5 YearsMore Than 5 Years
Operating lease obligations(1)
$274,478  $59,522  $96,772  $81,072  $37,112  
Purchase obligations$104,538  $40,572  $61,466  $2,500  $—  
 Payments Due by Period
 Total Less Than 1 Year 1 – 3 Years 3 – 5 Years More Than 5 Years
Operating lease obligations$332,836
 $49,481
 $105,274
 $84,540
 $93,541
Purchase obligations$40,929
 $29,791
 $10,939
 $199
 $
(1) In October 2019, the Company entered into a lease agreement for an office facility in London, U.K. for which the lease term has not yet commenced, with lease obligations of approximately $15.0 million. The lease is expected to commence in 2020 and will expire 2030. The Company expects to classify it as an operating lease. Because the lease had not yet commenced as of December 31, 2019, payments related to this lease are not included in the above table.
The contractual commitment amounts in the table above are associated with binding agreements and do not include obligations under contracts that we can cancel without a significant penalty. In addition, as of December 31, 2017,2019, our total liability for uncertain tax positions was $3.4 million of the total unrecognized benefit of $18.2$5.6 million. We are not reasonably able to estimate the timing of future cash flow related to this liability. As a result, this amount is not included in the contractual obligations table above.
We have subleased certain office facilities under operating lease agreements that expire in 2021.2025. The terms of these lease agreements provide for rental receipts on a graduated basis. We recognize sublease rentals on a straight-line basis over the lease
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periods reflected as a reduction in rental expense. As of December 31, 2017,2019, our future minimum rental receipts to be received under non-cancelable subleases were $6.5$37.5 million.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk.
We have operations both within the United States and internationally, and we are exposed to market risks in the ordinary course of business. These risks include primarily interest rate, foreign exchange risks and inflation, and have not changed materially from the market risks we were exposed to in the year ended December 31, 2016.2018.
Interest Rate Fluctuation
The primary objective of our investment activities is to preserve principal while maximizing income without significantly increasing risk.
Our cash and cash equivalents consist of cash, and money market funds.funds and commercial paper. We do not have any long-term borrowings. Because our cash and cash equivalents have a relatively short maturity, their fair value is relatively insensitive to interest rate changes. We believe a hypothetical 10% increase in the interest rates as of December 31, 20172019 would not have a material impact on our cash and cash equivalents portfolio.
Our marketable securities are comprised ofcomprise fixed-rate debt securities issued by U.S. corporations, U.S. government agencies and the U.S. Treasury; as such, their fair value may be affected by fluctuations in interest rates in the broader economy. As we have both the ability and intent to hold these securities to maturity, such fluctuations would have no impact on our results of operations.
Foreign Currency Exchange Risk

We have foreign currency risks related to our revenue and operating expenses denominated in currencies other than the U.S. dollar, principally in the British pound sterling, Canadian dollar and the Euro. The volatility of exchange rates depends on many factors that we cannot forecast with reliable accuracy. Although we have experienced and will continue to experience fluctuations in net income (loss) as a result of transaction gains (losses), net, related to revaluing certain cash balances, trade accounts receivable balances and intercompany balances that are denominated in currencies other than the U.S. dollar, we believe a hypothetical 10% strengthening/strengthening (weakening) of the U.S. dollar against the British pound sterling, Canadian dollar or Euro, either alone or in combination with each other, would not have a material impact on our results of operations. In the event our foreign sales and expenses increase as a proportion of our overall sales and expenses, our operating results may be more greatly affected by fluctuations in the exchange rates of the currencies in which we do business. At this time, we do not enter into derivatives or other financial instruments in an attempt to hedge our foreign currency exchange risk, though we may in the future. It is difficult to predict the impact hedging activities would have on our results of operations.
Inflation Risk
We do not believe that inflation has had a material effect on our business, financial condition or results of operations. If our costs were to become subject to significant inflationary pressures, we may not be able to fully offset such higher costs through price increases. Our inability or failure to do so could harm our business, financial condition or results of operations.

Item 8. Financial Statements and Supplementary Data.
Our financial statements and the report of our independent registered public accounting firm are included in this Annual Report beginning on page F-1.F-1. The index to our financial statements is included in Part IV, Item 15 below.

Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.
None.


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Item 9A. Controls and Procedures.
Evaluation of Disclosure Controls and Procedures
We maintain “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, that are designed to provide reasonable assurance that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms and is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the company’s management, including its principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure.
Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures as of December 31, 2017.2019. Based on this evaluation, our Chief Executive Officer and Chief Financial Officer concluded that, as of December 31, 2017,2019, our disclosure controls and procedures were effective at the reasonable assurance level.

Management’s Annual Report on Internal Control Over Financial Reporting
Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a-15(f) and 15d-15(f). Under the supervision and with the participation of our Chief Executive Officer and Chief Financial Officer, our management evaluated the effectiveness of our internal control over financial reporting based on the framework set forth in “Internal Control—Integrated Framework (2013)” issued by the Committee of Sponsoring Organizations of the Treadway Commission. The scope of management's assessment of the effectiveness of our internal control over financial reporting included all of our consolidated operations except for the operations of Nowait, which we acquired on February 28, 2017, and Turnstyle, which we acquired on April 3, 2017. These exclusions are in accordance with the SEC's general guidance that an assessment of a recently acquired business may be omitted from the scope of our evaluation in the year of acquisition. Excluding the goodwill and intangible assets acquired through the acquisition of these businesses, which were included in the scope of management's assessment, each of Nowait and Turnstyle accounted for less than one percent of the total assets and total revenues of the Company's consolidated financial statements as of and for the year ended December 31, 2017. Based on this evaluation, our management concluded that our internal control over financial reporting was effective as of December 31, 2017.2019. Our management reviewed the results of this evaluation with the audit committee of our board of directors.
Deloitte & Touche LLP, an independent registered public accounting firm, has audited the consolidated financial statements included in this Annual Report and, as part of the audit, has issued a report on the effectiveness of our internal control over financial reporting as of December 31, 2017,2019, which is included below.
Changes in Internal Control Over Financial Reporting
There was no change in our internal control over financial reporting identified in connection with the evaluation required by Rule 13a-15(d) and 15d-15(d) of the Exchange Act that occurred during the three months ended December 31, 20172019 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.
Inherent Limitations on Effectiveness of Controls
Our management, including our Chief Executive Officer and our Chief Financial Officer, believes that our disclosure controls and procedures and internal control over financial reporting are designed to provide reasonable assurance of achieving their objectives and are effective at the reasonable assurance level. However, our management does not expect that our disclosure controls and procedures or our internal control over financial reporting will prevent all errors and all fraud. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, have been detected. These inherent limitations include the realities that judgments in decision making can be faulty, and that breakdowns can occur because of a simple error or mistake. Additionally, controls can be circumvented by the individual acts of some persons, by the collusion of two or more people or by management override of controls. The design of any system of controls is also based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions; over time, controls may become inadequate because of changes in conditions, or the degree of compliance with policies or procedures may deteriorate. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected.

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the Stockholders and the Board of Directors and
Stockholders of Yelp Inc.


Opinion on Internal Control over Financial Reporting


We have audited the internal control over financial reporting of Yelp Inc. and subsidiaries (the “Company”) as of December 31, 2017,2019, based on criteria established in Internal Control -Control- Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2017,2019, based on criteria established in Internal Control -Control- Integrated Framework (2013)issued by COSO.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated financial statements as of and for the year ended December 31, 20172019 of the Company and our report dated February 28, 2018,2020, expressed an unqualified opinion on those financial statements.statements and included an explanatory paragraph regarding the Company’s adoption of a new accounting standard.
As described in Management’s Annual Report on Internal Control Over Financial Reporting, management excluded from its assessment the internal control over financial reporting at Nowait, which was acquired on February 28, 2017, and Turnstyle, which was acquired on April 3, 2017. Nowait and Turnstyle’s financial statements each constitute less than one percent of the total assets and total revenues of the Company's consolidated financial statement amounts as of and for the year ended December 31, 2017. Accordingly, our audit did not include the internal control over financial reporting at Nowait and Turnstyle.
Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Annual Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.



/s/ DELOITTE & TOUCHE LLP
San Francisco, California
February 28, 20182020

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Item 9B. Other Information.
None.

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PART III

Item 10. Directors, Executive Officers and Corporate Governance.
Information required by this item regarding directors and director nominees, executive officers, the board of directors and its committees, and certain corporate governance matters is incorporated by reference to the information set forth under the captions “Proposal No. 1—Election of Directors,” “Information Regarding the Board of Directors and Corporate Governance” and “Executive Officers” in the definitive proxy statement for our 20182020 Annual Meeting of Stockholders, or the 20182020 Proxy Statement. Information required by this item regarding compliance with Section 16(a) of the Exchange Act is incorporated by reference to the information set forth under the caption “Section“Delinquent Section 16(a) Beneficial Ownership Reporting Compliance”Reports” in our 20182020 Proxy Statement.
We have adopted a written code of business conduct and ethics that applies to all of our employees, officers and directors, including our principal executive officer, principal financial officer and principal accounting officer. The code of business conduct and ethics is available on our corporate website at www.yelp-ir.com under the section entitled “Corporate Governance.” If we make any substantive amendments to our code of business conduct and ethics or grant any of our directors or executive officers any waiver, including any implicit waiver, from a provision of our code of business conduct and ethics, we will disclose the nature of the amendment or waiver on our website or in a Current Report on Form 8-K.

Item 11. Executive Compensation.
Information required by this item regarding executive compensation is incorporated by reference to the information set forth under the captions “Executive Compensation,” “Director Compensation” and “Information Regarding the Board of Directors and Corporate Governance” in our 20182020 Proxy Statement.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.
Information required by this item regarding security ownership of certain beneficial owners and management is incorporated by reference to the information set forth under the caption “Security Ownership of Certain Beneficial Owners and Management” in our 20182020 Proxy Statement. Information required by this item regarding securities authorized for issuance under our equity compensation plans is incorporated by reference to the information set forth under the caption “Equity Compensation Plan Information” in our 20182020 Proxy Statement.

Item 13. Certain Relationships and Related Transactions, and Director Independence.
Information required by this item regarding certain relationships and related transactions is incorporated by reference to the information set forth under the caption “Transactions with Related Persons” in our 20182020 Proxy Statement. Information required by this item regarding director independence is incorporated by reference to the information set forth under the caption “Information Regarding the Board of Directors and Corporate Governance” in our 20182020 Proxy Statement.

Item 14. Principal Accounting Fees and Services.
Information required by this item regarding principal accounting fees and services is incorporated by reference to the information set forth under the caption “Proposal No. 2—Ratification of Selection of Independent Registered Public Accounting Firm” in our 20182020 Proxy Statement.

58

PART IV

Item 15. Exhibits, Financial Statement Schedules.
(a)The following documents are filed as part of this Annual Report:
1.
Financial Statements. Our consolidated financial statements and the Report of Independent Registered Public
Accounting Firm are included herein on the pages indicated:
2.
Financial Statement Schedules. None. All financial statement schedules are omitted because they are not applicable, not required under the instructions, or the requested information is included in the consolidated financial statements or notes thereto.
3.
Exhibits. The following is a list of exhibits filed with this report or incorporated herein by reference:

Incorporated by Reference
ExhibitFilingFiled
NumberExhibit DescriptionFormFile No.ExhibitDateHerewith
Agreement and Plan of Merger, dated February 9, 2015, by and among Yelp Inc., Eat24Hours.com, Inc., Kale Acquisition Corp., Quinoa Acquisition LLC, the Stockholders of Eat24Hours.com, Inc. and Nadav Sharon, as Stockholders’ Agent.8-K001-3544499.1  2/10/2015
Agreement and Plan of Merger, dated February 28, 2017, by and among Yelp Inc., Nowait, Inc., Beagle Acquisition Corp. and Shareholder Representative Services LLC, as Stockholders’ Agent.8-K001-354442.1  3/6/2017
Share Purchase Agreement, dated April 3, 2017, by and among Yelp Inc., 10036773 Canada Inc., Turnstyle Analytics Inc., the shareholders of Turnstyle Analytics Inc., the vested option holders of Turnstyle Analytics Inc., 500 Startups IV, L.P. and Fortis Advisors LLC, as Securityholders’ Agent.8-K001-354442.1  4/7/2017
Unit Purchase Agreement, dated as of August 3, 2017, by and among Yelp Inc., Eat24, LLC, Grubhub Inc. and Grubhub Holdings Inc.10-Q001-354442.3  8/9/2017
Amended and Restated Certificate of Incorporation of Yelp Inc.8-A/A001-354443.2  9/23/2016
Amended and Restated Bylaws of Yelp Inc., as amended.8-K001-354443.1  2/13/2019
4.1  Reference is made to Exhibits 3.1 and 3.2.
Form of Common Stock Certificate.8-A/A001-354444.1  9/23/2016
Amended and Restated 2005 Equity Incentive Plan.S-1333-17803010.2  11/17/2011
Forms of Option Agreement and Option Grant Notice under Amended and Restated 2005 Equity Incentive Plan.S-1333-17803010.3  11/17/2011
2011 Equity Incentive Plan.S-1333-17803010.4  2/3/2012
Forms of Option Agreement and Option Grant Notice under 2011 Equity Incentive Plan.S-1333-17803010.5  2/3/2012
59


            Filed
      Incorporated by Reference Herewith
Exhibit            
Number Exhibit Description Form File No. Exhibit Filing Date  

 Agreement and Plan of Merger, dated July 18, 2013, by and among Yelp Inc., Ranger Merger Corp., Ranger Merger LLC, SeatMe, Inc. and Alexander Kvamme, as Stockholders' Agent. 8-K 
001-35444

 99.1 7/24/2013  

 Agreement and Plan of Merger, dated February 9, 2015, by and among Yelp Inc., Eat24Hours.com, Inc., Kale Acquisition Corp., Quinoa Acquisition LLC, the Stockholders of Eat24Hours.com, Inc. and Nadav Sharon, as Stockholders’ Agent. 8-K 001-35444 99.1 2/10/2015  

 
Agreement and Plan of Merger, dated February 28, 2017, by and among Yelp Inc., Nowait, Inc., Beagle Acquisition Corp. and Shareholder Representative Services LLC, as Stockholders’ Agent.

 8-K 001-35444 2.1 3/6/2017  

 
Share Purchase Agreement, dated April 3, 2017, by and among Yelp Inc., 10036773 Canada Inc., Turnstyle Analytics Inc., the shareholders of Turnstyle Analytics Inc., the vested option holders of Turnstyle Analytics Inc., 500 Startups IV, L.P. and Fortis Advisors LLC, as Securityholders’ Agent.

 8-K 001-35444 2.1 4/7/2017  

 
Unit Purchase Agreement, dated as of August 3, 2017, by and among Yelp Inc., Eat24, LLC, Grubhub Inc. and Grubhub Holdings Inc.

 10-Q 001-35444 2.3 8/9/2017  

 Amended and Restated Certificate of Incorporation of Yelp Inc. 8-A/A 001-35444 3.2 9/23/2016  

 Amended and Restated Bylaws of Yelp Inc. S-1/A 333-178030 3.4 2/3/2012  
4.1
 Reference is made to Exhibits 3.1 and 3.2.          

 Form of Common Stock Certificate. 8-A/A 001-35444 4.1 9/23/2016  

 Amended and Restated 2005 Equity Incentive Plan. S-1 333-178030 10.2 11/17/2011  

 Forms of Option Agreement and Option Grant Notice under Amended and Restated 2005 Equity Incentive Plan. S-1 333-178030 10.3 11/17/2011  

 2011 Equity Incentive Plan. S-1 333-178030 10.4 2/3/2012  

 Forms of Option Agreement and Option Grant Notice under 2011 Equity Incentive Plan. S-1 333-178030 10.5 2/3/2012  

 2012 Equity Incentive Plan, as amended. 8-K 001-35444 10.1 9/23/2016  



Incorporated by Reference
ExhibitFilingFiled
NumberExhibit DescriptionFormFile No.ExhibitDateHerewith
2012 Equity Incentive Plan, as amended.8-K001-3544410.2  2/13/2019
Forms of Option Agreement and Grant Notice and RSU Agreement and Grant Notice under 2012 Equity Incentive Plan.S-1/A333-17803010.17  2/3/2012
Forms of Performance Restricted Stock Unit Award Grant Notice and Agreement under 2012 Equity Incentive Plan.10-Q001-3544410.1  5/10/2019
2012 Employee Stock Purchase Plan, as amended.8-K001-3544410.2  9/23/2016
Executive Severance Benefit Plan, as amended.X
Form of Indemnification Agreement made by and between Yelp Inc. and each of its directors and executive officers.S-1333-17803010.6  2/3/2012
Offer Letter, by and between Yelp Inc. and Jeremy Stoppelman, dated February 3, 2012.S-1/A333-17803010.15  2/3/2012
Offer Letter, dated December 27, 2019, by and between Yelp Inc. and David Schwarzbach.X
Amended and Restated Offer Letter, by and between Yelp Inc. and Joseph Nachman, dated February 3, 2012.S-1/A333-17803010.9  2/3/2012
Letter Agreement, dated May 22, 2014, by and between Joseph Nachman and Yelp Inc.8-K001-3544499.1  5/28/2014
Offer Letter, dated April 1, 2009, by and between Yelp Inc. and Vivek Patel.10-Q001-3544410.2  5/10/2019
Amended and Restated Offer Letter, by and between Yelp Inc. and Laurence Wilson, dated February 3, 2012.S-1/A333-17803010.10  2/3/2012
Offer Letter, dated January 17, 2019, by and between Yelp Inc. and James Miln.X
Compensation Information for Registrant’s Executive Officers.8-K001-354442/24/2020
Compensation Information for Registrant's Non-Employee Directors.8-K001-354442/13/2020
Amended and Restated Lease, dated April 1, 2015, by and between Stockdale Galleria Project Owner, LLC and Yelp Inc.; First Amendment to Lease, dated July 30, 2015; Second Amendment to Lease, dated April 22, 2016; Third Amendment to Lease, dated July 22, 2016.10-K001-3544410.23  3/1/2017
License Agreement between Harrison 160, LLC, as Licensor, and MRL Ventures Inc., as Licensee, dated as of April 6, 2004; Addendums through November 10, 2011.S-1/A333-17803010.14  2/3/2012
Office Lease, dated May 9, 2012, by and between Yelp Inc. and Stockbridge 138 New Montgomery LLC, as amended.10-K001-3544410.25  3/1/2017
Lease, dated July 31, 2014, by and between Yelp Inc. and 11 Madison Avenue LLC.8-K001-3544410.1  8/6/2014
Subsidiaries of Yelp Inc.X
Consent of Independent Registered Public Accounting Firm.X
Power of Attorney (included on signature page).X
Certification pursuant to Rule 13a-14(a)/15d-14(a).X
Certification pursuant to Rule 13a-14(a)/15d-14(a).X
60


            Filed
      Incorporated by Reference Herewith
Exhibit            
Number Exhibit Description Form File No. Exhibit Filing Date  
 Forms of Option Agreement and Grant Notice and RSU Agreement and Grant Notice under 2012 Equity Incentive Plan. S-1/A 333-178030 10.17 2/3/2012  
 2012 Employee Stock Purchase Plan, as amended. 8-K 001-35444 10.2 9/23/2016  
 Executive Severance Benefit Plan. S-1/A 333-178030 10.19 2/3/2012  
 Form of Indemnification Agreement made by and between Yelp Inc. and each of its directors and executive officers. S-1 333-178030 10.6 2/3/2012  
 Offer Letter, by and between Yelp Inc. and Jeremy Stoppelman, dated February 3, 2012. S-1/A 333-178030 10.15 2/3/2012  
 Employment Offer Letter, dated April 15, 2016, between Yelp Inc. and Charles Baker. 8-K 001-35444 10.1 4/18/2016  
 Amended and Restated Offer Letter, by and between Yelp Inc. and Jed Nachman, dated February 3, 2012. S-1/A 333-178030 10.9 2/3/2012  
 Letter Agreement, dated May 22, 2014, by and between Joseph Nachman and Yelp Inc. 8-K 001-35444 99.1 5/28/2014  
 Amended and Restated Offer Letter, by and between Yelp Inc. and Laurence Wilson, dated February 3, 2012. S-1/A 333-178030 10.10 2/3/2012  
 Offer Letter, dated July 13, 2012, by and between Yelp Inc. and Alan Ramsay. 10-Q 001-35444 10.1 5/10/2017  
 Offer Letter Agreement, dated March 27, 2007, by and between Yelp Inc. and Michael Stoppelman. 10-K 001-35444 10.15 3/1/2017  
 Transition Agreement, dated February 17, 2017, by and between Yelp Inc. and Michael Stoppelman 8-K 001-35444 10.1 2/17/2017  
 Amended and Restated Offer letter, by and between Yelp Inc. and Geoff Donaker, dated February 3, 2012. S-1/A 333-178030 10.7 2/3/2012  
 Transition Agreement, dated August 8, 2016, by and between Yelp Inc. and Geoff Donaker. 8-K 001-35444 10.1 8/9/2016  
 Form of Restricted Stock Unit Agreement and Notice. 8-K 001-35444 10.2 2/8/2016  
 Compensation Information for Registrant’s Executive Officers. 8-K 001-35444   1/17/2018  
 Amended and Restated Lease, dated April 1, 2015, by and between Stockdale Galleria Project Owner, LLC and Yelp Inc.; First Amendment to Lease, dated July 30, 2015; Second Amendment to Lease, dated April 22, 2016; Third Amendment to Lease, dated July 22, 2016. 10-K 001-35444 10.23 3/1/2017  
 License Agreement between Harrison 160, LLC, as Licensor, and MRL Ventures Inc., as Licensee, dated as of April 6, 2004; Addendums through November 10, 2011. S-1/A 333-178030 10.14 2/3/2012  
 Office Lease, dated May 9, 2012, by and between Yelp Inc. and Stockbridge 138 New Montgomery LLC, as amended. 10-K 001-35444 10.25 3/1/2017  
 Lease, dated July 31, 2014, by and between Yelp Inc. and 11 Madison Avenue LLC. 8-K 001-35444 10.1 8/6/2014  
 Subsidiaries of Yelp Inc.         X
 Consent of Independent Registered Public Accounting Firm.         X
 Power of Attorney (included on signature page).         X
 Certification pursuant to Rule 13a-14(a)/15d-14(a).         X
 Certification pursuant to Rule 13a-14(a)/15d-14(a).         X
 Certifications of Chief Executive Officer and Chief Financial Officer.         X
101.INS# XBRL Instance Document.         X
101.SCH# XBRL Taxonomy Extension Schema Document.         X
             
*Indicates management contract or compensatory plan or arrangement.
Incorporated by Reference
ExhibitFilingFiled
NumberExhibit DescriptionFormFile No.ExhibitDateHerewith
Certifications of Chief Executive Officer and Chief Financial Officer.X
101.INSXBRL Instance Document.X
101.SCHXBRL Taxonomy Extension Schema Document.X
101.CALXBRL Taxonomy Extension Calculation Linkbase Document.X
101.DEFXBRL Taxonomy Extension Definition Linkbase Document.X
101.LABXBRL Taxonomy Extension Labels Linkbase Document.X
101.PREXBRL Taxonomy Extension Presentation Linkbase Document.X
104Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101).X
* Indicates management contract or compensatory plan or arrangement.
 The certifications attached as Exhibit 32.1 accompany this Annual Report on Form 10-K are not deemed filed with the Securities and Exchange Commission and are not to be incorporated by reference into any filing of Yelp Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, whether made before or after the date of this Annual Report on Form 10-K, irrespective of any general incorporation language contained in such filing.


Item 16. Form 10-K Summary.
None.

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SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
Date: February 28, 2018
2020
Yelp Inc.
Yelp Inc.
/s/ David Schwarzbach
/s/ Charles BakerDavid Schwarzbach
Charles Baker
Chief Financial Officer
(Principal Financial and Accounting Officer)
POWEROFATTORNEY
KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Charles BakerDavid Schwarzbach and Laurence Wilson, and each of them, as his or her true and lawful attorneys-in-fact and agents, with full power of substitution for him or her, and in his or her name in any and all capacities, to sign any and all amendments to this Annual Report on Form 10-K, and to file the same, with exhibits thereto and other documents in connection therewith, with the U.S. Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done therewith, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, and either of them, his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof.
Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.
SignatureTitleDate
SignatureTitleDate
/s/ Jeremy StoppelmanChief Executive Officer and DirectorFebruary 28, 20182020
Jeremy Stoppelman
(Principal Executive Officer)
/s/ Charles BakerDavid SchwarzbachChief Financial OfficerFebruary 28, 20182020
Charles BakerDavid Schwarzbach
(Principal Financial and Accounting Officer)
/s/ Diane IrvineChairpersonFebruary 28, 20182020
Diane Irvine
/s/ Fred AndersonDirectorFebruary 28, 20182020
Fred Anderson
/s/ Geoff DonakerDirectorFebruary 28, 2018
Geoff Donaker
/s/ Peter FentonDirectorFebruary 28, 2018
Peter Fenton
/s/ Robert GibbsDirectorFebruary 28, 20182020
Robert Gibbs
/s/ Jeremy LevineGeorge HuDirectorFebruary 28, 20182020
Jeremy LevineGeorge Hu
/s/ Mariam NaficySharon RothsteinDirectorFebruary 28, 20182020
Mariam NaficySharon Rothstein
/s/ Brian SharplesDirectorFebruary 28, 2020
Brian Sharples



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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the Stockholders and the Board of Directors and
Stockholders of Yelp Inc.



Opinion on the Financial Statements


We have audited the accompanying consolidated balance sheets of Yelp Inc. and subsidiaries (the "Company") as of December 31, 20172019 and 2016,2018, the related consolidated statements of operations, comprehensive income, (loss), stockholders’stockholders' equity, and cash flows, for each of the three years in the period ended December 31, 2017,2019, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of Yelp Inc. and subsidiariesthe Company as of December 31, 20172019 and 2016,2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2017,2019, in conformity with accounting principles generally accepted in the United States of America.


We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2017,2019, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 28, 20182020, expressed an unqualified opinion on the Company's internal control over financial reporting.


Change in Accounting Principle

As discussed in Note 2 to the financial statements, effective January 1, 2019, the Company adopted Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) Topic 842, Leases (ASC 842) using the modified retrospective approach. The incremental borrowing rate (IBR) used upon adoption of ASC 842 to calculate the present value of future lease payments is also communicated as a critical audit matter below.

Basis for Opinion

These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.



Critical Audit Matters

The critical audit matters communicated below are matters arising from the current-period audit of the financial statements that were communicated or required to be communicated to the audit committee and that (1) relate to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matters below, providing separate opinions on the critical audit matters or on the accounts or disclosures to which they relate.

Advertising Revenue — Refer to Note 2 to the financial statements

Critical Audit Matter Description

The Company’s revenue consists of advertising placements, primarily performance-based cost-per-click advertising (CPC), which is comprised of a significant volume of low-dollar transactions, initiated and maintained within internally developed systems. The processing and recording of those transactions is highly automated and is based on contractual terms with customers. The Company relies on information from these internally developed systems and automations to record its CPC revenue.

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We identified CPC revenue as a critical audit matter because the Company’s processes to record CPC revenue are highly dependent on internally developed systems and automations. This required an increased extent of effort, including the need for us to involve professionals with expertise in information technology (IT), to identify, test, and evaluate the Company’s systems, databases, tools, software applications, and automated controls.

How the Critical Audit Matter Was Addressed in the Audit

Our audit procedures related to the Company’s processes and systems used to record CPC revenue included the following, among others:

We tested internal controls within the relevant CPC revenue business processes, including those in place to reconcile the various systems to the Company’s general ledger and address the accuracy and completeness of contract data.

With the assistance of our IT specialists, we:

Identified the significant systems, automated controls, and tools used to maintain databases and process CPC revenue transactions and tested the general IT controls over each of these systems, including testing of user access controls, change management controls, and IT operations controls.

Performed testing of system interface controls and automated controls within CPC revenue transactions, as well as the controls designed to address the accuracy and completeness of CPC revenue.

With the assistance of our data specialists, we created data visualizations to evaluate recorded CPC revenue and evaluate trends in the transactional CPC revenue data.

We generated synthetic click transactions on the Company’s website and traced the recording of these transactions into the Company’s systems to understand how CPC revenue transactions are initiated, processed, and aggregated.

For a sample of CPC revenue transactions, we performed detail transaction testing by agreeing the amounts recognized to source documentation and system reports.

Leases — Refer to Notes 2 and 10 to the financial statements

Critical Audit Matter Description

The Company adopted and began applying ASC 842 on January 1, 2019, which generally requires lessees to recognize a right-of-use asset and lease liability for all leases. The adoption of this new accounting standard resulted in the recognition of operating lease right-of-use assets of $233.0 million, current operating lease liabilities of $55.2 million, and long-term operating lease liabilities of $212.5 million on the consolidated balance sheet upon adoption on January 1, 2019.

As part of measuring the lease liability upon adoption, the Company calculated its incremental borrowing rate (IBR), based on hypothetical borrowings to fund each respective lease over the lease terms. The Company’s IBR calculation is derived based on the Company’s implied credit rating and other market rate information of similar companies. The determination of its IBR requires management to use significant estimates and assumptions, including credit ratings, lease tenures, and adjustments for the effects of collateral.

We identified the IBR as a critical audit matter given the significant judgments management is required to make to determine the IBR to apply to the calculation of the lease liability for each lease. This required an increased extent of effort and auditor judgment, including the need to involve a valuation specialist.

How the Critical Audit Matter Was Addressed in the Audit

Our audit procedures related to the determination of the IBR included the following, among others:

We tested the effectiveness of management’s controls over the determination and appropriateness of the IBR.

With the assistance of our fair value specialists, we:

Assessed the reasonableness of the methodology used to estimate the IBR based on the definition and related guidance in ASC 842.

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Assessed the reasonableness of the implied credit rating, collateral, base rate, and spreads applied in determining the IBR by comparing to Company specific benchmarks, comparable companies, and other market information.

Evaluated the reasonableness of the models and the mathematical accuracy of the calculations used to estimate the IBR, including validating the inputs used for each lease tenure.


/s/ DELOITTE & TOUCHE LLP
San Francisco, California
February 28, 20182020


We have served as the Company's auditor since 2008.


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Yelp Inc.YELP INC.
CONSOLIDATED BALANCE SHEETS
(In thousands, except share data)
December 31,
2017
 December 31,
2016
December 31,
2019
December 31,
2018
Assets   Assets
Current assets:   Current assets:
Cash and cash equivalents$547,850
 $272,201
Cash and cash equivalents$170,281  $332,764  
Short-term marketable securities273,366
 207,332
Short-term marketable securities242,000  423,096  
Accounts receivable (net of allowance for doubtful accounts of $7,352 and $4,992
at December 31, 2017 and December 31, 2016, respectively)
76,173
 68,725
Accounts receivable (net of allowance for doubtful accounts of $7,686 and $8,685
at December 31, 2019 and December 31, 2018, respectively)
Accounts receivable (net of allowance for doubtful accounts of $7,686 and $8,685
at December 31, 2019 and December 31, 2018, respectively)
106,832  87,305  
Prepaid expenses and other current assets15,700
 12,921
Prepaid expenses and other current assets14,196  17,104  
Total current assets913,089
 561,179
Total current assets533,309  860,269  
Long-term marketable securities25,032
 
Long-term marketable securities53,499  —  
Property, equipment and software, net103,651
 92,440
Property, equipment and software, net110,949  114,800  
Operating lease right-of-use assetsOperating lease right-of-use assets197,866  —  
Goodwill107,954
 170,667
Goodwill104,589  105,620  
Intangibles, net16,893
 32,611
Intangibles, net10,082  13,359  
Restricted cash18,554
 17,317
Restricted cash22,037  22,071  
Other non-current assets31,339
 10,992
Other non-current assets38,369  59,444  
Total assets$1,216,512
 $885,206
Total assets$1,070,700  $1,175,563  
Liabilities and Stockholders’ Equity   Liabilities and Stockholders’ Equity
Current liabilities:   Current liabilities:
Accounts payable- trade$4,568
 $2,003
Accounts payable- merchant share4,465
 18,352
Accrued liabilities73,665
 36,730
Accounts payable and accrued liabilitiesAccounts payable and accrued liabilities$72,333  $61,062  
Operating lease liabilities — currentOperating lease liabilities — current57,507  —  
Deferred revenue3,469
 3,314
Deferred revenue4,315  3,843  
Total current liabilities86,167
 60,399
Total current liabilities134,155  64,905  
Long-term liabilities30,737
 17,621
Operating lease liabilities — long-termOperating lease liabilities — long-term174,756  —  
Other long-term liabilitiesOther long-term liabilities6,798  35,140  
Total liabilities116,904
 78,020
Total liabilities315,709  100,045  
Commitments and contingencies (Note 12)

 

Commitments and contingencies (Note 15)
Commitments and contingencies (Note 15)
Stockholders’ equity:   Stockholders’ equity:
Common stock, $0.000001 par value — 200,000,000 and 200,000,000 shares
authorized, 83,724,916 and 79,429,833 shares issued and outstanding at
December 31, 2017 and December 31, 2016, respectively

 
Common stock, $0.000001 par value — 200,000,000 shares
authorized, 71,185,468 and 81,996,839 shares issued and outstanding at
December 31, 2019 and December 31, 2018, respectively
Common stock, $0.000001 par value — 200,000,000 shares
authorized, 71,185,468 and 81,996,839 shares issued and outstanding at
December 31, 2019 and December 31, 2018, respectively
—  —  
Additional paid-in capital1,038,017
 892,983
Additional paid-in capital1,259,803  1,139,462  
Treasury stock(46) 
Accumulated other comprehensive loss(8,444) (15,576)Accumulated other comprehensive loss(11,759) (11,021) 
Retained earnings (accumulated deficit)70,081
 (70,221)
Accumulated deficitAccumulated deficit(493,053) (52,923) 
Total stockholders’ equity1,099,608
 807,186
Total stockholders’ equity754,991  1,075,518  
Total liabilities and stockholders’ equity$1,216,512
 $885,206
Total liabilities and stockholders’ equity$1,070,700  $1,175,563  
See notes to consolidated financial statements.


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Yelp Inc.YELP INC.
CONSOLIDATED STATEMENTS OF OPERATIONS
(In thousands, except per share data)
Year Ended December 31,
201920182017
Net revenue$1,014,194  $942,773  $850,847  
Costs and expenses:
Cost of revenue (exclusive of depreciation and amortization shown separately below)62,410  57,872  70,518  
Sales and marketing500,386  483,309  437,424  
Product development230,440  212,319  175,787  
General and administrative136,091  120,569  109,707  
Depreciation and amortization49,356  42,807  41,198  
Restructuring and integration—  —  288  
Gain on disposal of a business unit—  —  (163,697) 
Total costs and expenses978,683  916,876  671,225  
Income from operations35,511  25,897  179,622  
Other income, net14,256  14,109  4,864  
Income before income taxes49,767  40,006  184,486  
Provision for (benefit from) income taxes8,886  (15,344) 31,491  
Net income attributable to common stockholders$40,881  $55,350  $152,995  
Net income per share attributable to common stockholders
Basic$0.55  $0.66  $1.87  
Diluted$0.52  $0.62  $1.76  
Weighted-average shares used to compute net income per share attributable to common stockholders
Basic74,627  83,573  81,602  
Diluted77,969  88,709  87,170  
 Year Ended December 31,
 2017 2016 2015
Net revenue$846,813
 $713,069
 $549,711
Costs and expenses:     
Cost of revenue (exclusive of depreciation and amortization
shown separately below)
70,518
 60,363
 51,015
Sales and marketing438,643
 382,854
 301,764
Product development175,787
 138,549
 107,786
General and administrative105,673
 97,481
 80,866
Depreciation and amortization41,198
 35,346
 29,604
Restructuring and integration288
 3,455
 
Gain on disposal of a business unit(164,779) 
 
Total costs and expenses667,328
 718,048
 571,035
Income (loss) from operations179,485
 (4,979) (21,324)
Other income, net4,864
 1,694
 386
Income (loss) before income taxes184,349
 (3,285) (20,938)
Provision for income taxes(31,491) (1,385) (11,962)
Net income (loss) attributable to common stockholders(1)
$152,858
 $(4,670) $(32,900)
Net income (loss) per share attributable to common stockholders(1)
     
Basic$1.87
 $(0.06) $(0.44)
Diluted$1.75
 $(0.06) $(0.44)
Weighted-average shares used to compute net income (loss) per share attributable to common stockholders(1)
     
Basic81,602
 77,186
 74,683
Diluted87,170
 77,186
 74,683
(1)   The structure of the Company’s common stock changed in the year ended December 31, 2016. Refer to Note 13 for details.
See notes to consolidated financial statements.



Yelp Inc.
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Table of Contents
YELP INC.
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
(In thousands)
Year Ended December 31,
201920182017
Net income$40,881  $55,350  $152,995  
Other comprehensive (loss) income:
Foreign currency translation adjustments(738) (2,760) 7,620  
Foreign currency adjustments to net income upon liquidation of investments in foreign entities—  183  (488) 
Other comprehensive (loss) income(738) (2,577) 7,132  
Comprehensive income$40,143  $52,773  $160,127  
 Year Ended December 31,
 2017 2016 2015
Net income (loss)$152,858
 $(4,670) $(32,900)
Other comprehensive income (loss):     
Foreign currency translation adjustments7,620
 (2,057) (7,910)
Foreign currency adjustments to net income upon liquidation of investment in foreign entities(488) 
 
Other comprehensive income (loss)7,132
 (2,057) (7,910)
Comprehensive income (loss)$159,990
 $(6,727) $(40,810)

See notes to consolidated financial statements



Yelp Inc.
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Table of Contents
YELP INC.
CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY
FOR THE YEARS ENDED DECEMBER 31, 2015, 20162017, 2018 AND 20172019
(In thousands, except share data)
AdditionalAccumulated
Other
Retained
Earnings
Total
Common StockPaid-InTreasuryComprehensive(AccumulatedStockholders'
SharesAmountCapitalStockLossDeficit)Equity
Balance as of December 31, 201679,429,833  $—  $892,983  $—  $(15,576) $(61,269) $816,138  
Issuance of common stock upon exercises of employee
stock options
1,519,771  —  29,997  —  —  —  29,997  
Issuance of common stock upon vesting of restricted stock units ("RSUs")2,702,838  —  —  —  —  —  —  
Issuance of common stock for employee stock purchase plan373,580  —  10,920  —  —  —  10,920  
Stock-based compensation (inclusive of capitalized stock-based compensation)—  —  106,639  —  —  —  106,639  
Shares withheld related to net share settlement of equity awards—  —  (2,522) —  —  —  (2,522) 
Repurchases of common stock—  —  —  (12,602) —  —  (12,602) 
Retirement of common stock(301,106) —  —  12,556  —  (12,556) —  
Foreign currency adjustment—  —  —  —  7,132  —  7,132  
Net income—  —  —  —  —  152,995  152,995  
Balance as of December 31, 201783,724,916  —  1,038,017  (46) (8,444) 79,170  1,108,697  
Issuance of common stock upon exercises of employee
stock options
779,871  —  15,581  —  —  —  15,581  
Issuance of common stock upon vesting of RSUs1,946,476  —  —  —  —  —  —  
Issuance of common stock for employee stock purchase plan442,679  —  14,198  —  —  —  14,198  
Stock-based compensation (inclusive of capitalized stock-based compensation)—  —  121,878  —  —  —  121,878  
Shares withheld related to net share settlement of equity awards—  —  (50,212) —  —  —  (50,212) 
Repurchases of common stock—  —  —  (187,397) —  —  (187,397) 
Retirement of common stock(4,897,103) —  —  187,443  —  (187,443) —  
Foreign currency adjustments—  —  —  —  (2,577) —  (2,577) 
Net income—  —  —  —  —  55,350  55,350  
Balance as of December 31, 201881,996,839  —  1,139,462  —  (11,021) (52,923) 1,075,518  
Issuance of common stock upon exercises of employee
stock options
826,124  —  17,488  —  —  —  17,488  
Issuance of common stock upon vesting of RSUs2,018,794  —  —  —  —  —  —  
Issuance of common stock for employee stock purchase plan534,120  —  14,775  —  —  —  14,775  
Stock-based compensation (inclusive of capitalized stock-based compensation)—  —  131,223  —  —  —  131,223  
Shares withheld related to net share settlement of equity awards—  —  (43,145) —  —  —  (43,145) 
Repurchases of common stock—  —  —  (481,011) —  —  (481,011) 
Retirement of common stock(14,190,409) —  —  481,011  —  (481,011) —  
Foreign currency adjustments—  —  —  —  (738) —  (738) 
Net income—  —  —  —  —  40,881  40,881  
Balance as of December 31, 201971,185,468  $—  $1,259,803  $—  $(11,759) $(493,053) $754,991  
     Additional   Accumulated
Other
 Retained
Earnings
 Total
 Common Stock Paid-In Treasury Comprehensive (Accumulated Stockholders'
 Shares Amount Capital Stock Income (Loss) Deficit) Equity
Balance-December 31, 201472,920,582
 $
 $627,742
 
 $(5,609) $(33,983) $588,150
Issuance of common stock upon exercises of employee
stock options
935,143
 
 12,255
 
 
 
 12,255
Issuance of common stock upon release of restricted stock units (RSUs)422,981
 
 
 
 
 
 
Issuance of common stock for employee stock purchase plan312,697
 
 8,911
 
 
 
 8,911
Stock-based compensation (inclusive of capitalized stock-based compensation)
 
 63,887
 
 
 
 63,887
Repurchase of common stock from employees(12,022) 
 (482) 
 
 
 (482)
Issuance of common stock in connection with acquisition of SeatMe, Inc.577
 
 
 
 
 
 
Issuance of common stock in connection with acquisition of Eat24Hours.com, Inc.1,402,844
 
 59,158
 
 
 
 59,158
Excess tax benefit from share-based award activity
 
 2,551
 
 
 
 2,551
Foreign currency translation adjustment
 
 
 
 (7,910) 
 (7,910)
Net loss
 
 
 
 
 (32,900) (32,900)
Balance-December 31, 201575,982,802
 
 774,022
 
 (13,519) (66,883) 693,620
Cumulative effect adjustment upon adoption of ASU 2016-09 (1)
 
 (1,163) 
 
 1,332
 169
Issuance of common stock upon exercises of employee
stock options
1,290,836
 
 20,599
 
 
 
 20,599
Issuance of common stock upon release of restricted stock units (RSUs)1,814,138
 
 
 
 
 
 
Issuance of common stock for employee stock purchase plan342,057
 
 8,923
 
 
 
 8,923
Stock-based compensation (inclusive of capitalized stock-based compensation)
 
 90,602
 
 
 
 90,602
Foreign currency translation adjustment
 
 
 
 (2,057) 
 (2,057)
Net loss
 
 
 
 
 (4,670) (4,670)
Balance-December 31, 201679,429,833
 
 892,983
 
 (15,576) (70,221) 807,186
Issuance of common stock upon exercises of employee
stock options
1,519,771
 
 29,997
 
 
 
 29,997
Issuance of common stock upon release of restricted stock units (RSUs)2,702,838
 
 
 
 
 
 
Issuance of common stock for employee stock purchase plan373,580
 
 10,920
 
 
 
 10,920
Stock-based compensation (inclusive of capitalized stock-based compensation)
 
 106,639
 
 
 
 106,639
Shares withheld related to net share settlement of equity awards
 
 (2,522) 
 
 
 (2,522)
Repurchase of common stock (2)(301,106) 
 
 (46) 
 (12,556) (12,602)
Foreign currency translation adjustment
 
 
 
 7,620
   7,620
Foreign currency translation adjustment due to dissolved subsidiaries      
 (488)   (488)
Net income
 
 
 
 
 152,858
 152,858
Balance-December 31, 201783,724,916
 
 $1,038,017
 (46) $(8,444) $70,081
 $1,099,608

(1)Adopted on a modified retrospective basis; refer to significant accounting policies in Note 2 for details regarding this adoption.
(2)1,100 shares were excluded from the share total that were repurchased but not yet retired, and held as treasury stock as of December 31, 2017.


See notes to consolidated financial statements.

Yelp Inc.
F-7

Table of Contents
YELP INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
(In thousands)
Year Ended December 31,
201920182017
Operating Activities
Net income$40,881  $55,350  $152,995  
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization49,356  42,807  41,198  
Provision for doubtful accounts22,543  24,515  20,917  
Stock-based compensation121,512  114,386  100,415  
Noncash lease cost41,365  —  —  
Deferred income taxes(2,799) (15,469) —  
Gain on disposal of a business unit—  —  (163,697) 
Other adjustments, net(2,997) (722) 1,512  
Changes in operating assets and liabilities, net of acquisitions and disposal of a business unit:
Accounts receivable(42,070) (35,664) (36,146) 
Prepaid expenses and other assets(1,349) (5,192) (2,581) 
Operating lease liabilities(41,808) —  —  
Accounts payable, accrued liabilities and other liabilities20,148  (19,824) 53,034  
Net cash provided by operating activities204,782  160,187  167,647  
Investing Activities
Purchases of marketable securities(541,451) (751,237) (354,895) 
Maturities of marketable securities674,097  613,700  264,000  
Sale of investment prior to maturity—  17,895  —  
Disposal of a business unit, net of cash sold—  —  252,663  
Acquisition, net of cash received—  —  (50,544) 
Release of escrow deposit28,750  —  —  
Purchases of property, equipment and software(37,522) (44,972) (30,245) 
Other investing activities461  245  157  
Net cash provided by (used in) investing activities124,335  (164,369) 81,136  
Financing Activities
Proceeds from issuance of common stock for employee stock-based plans32,263  29,779  40,917  
Taxes paid related to the net share settlement of equity awards(42,771) (50,144) (1,199) 
Repurchases of common stock(481,011) (187,382) (12,556) 
Net cash (used in) provided by financing activities(491,519) (207,747) 27,162  
Effect of exchange rate changes on cash, cash equivalents and restricted cash(115) 360  941  
Change in cash, cash equivalents and restricted cash(162,517) (211,569) 276,886  
Cash, cash equivalents and restricted cash — Beginning of period354,835  566,404  289,518  
Cash, cash equivalents and restricted cash — End of period$192,318  $354,835  $566,404  
Supplemental Disclosures of Other Cash Flow Information
Cash paid for income taxes, net of refunds$6,912  $29,159  $530  
Supplemental Disclosures of Noncash Investing and Financing Activities
Purchases of property, equipment and software recorded in accounts payable and accrued liabilities$1,490  $4,440  $11,493  
Goodwill measurement period adjustment$—  $—  $(178) 
Tax liability related to net share settlement of equity awards included in accrued liabilities$912  $971  $1,323  
Operating lease right-of-use assets obtained in exchange for new operating lease liabilities$6,325  $—  $—  
 Year Ended December 31,
 2017 2016 2015
OPERATING ACTIVITIES:     
Net income (loss)$152,858
 $(4,670) $(32,900)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:     
Depreciation and amortization41,198
 35,346
 29,604
Provision for doubtful accounts and sales returns18,414
 17,261
 16,788
Stock-based compensation100,415
 86,261
 60,842
Recording of valuation allowance
 1,351
 20,341
Excess tax benefit from stock-based award activity
 
 (6,583)
Gain on disposal of a business unit(164,779) 
 
Other adjustments(19) 1,625
 1,399
Changes in operating assets and liabilities:     
Accounts receivable(32,112) (31,624) (25,279)
Prepaid expenses and other assets(1,362) 5,687
 (22,703)
Accounts payable, accrued expenses and other liabilities52,882
 15,278
 15,894
Deferred revenue152
 385
 (41)
Net cash provided by operating activities167,647
 126,900
 57,362
INVESTING ACTIVITIES:     
Purchases of marketable securities(354,895) (274,965) (246,160)
Maturities of marketable securities264,000
 265,500
 202,870
Purchase of cost-method investment
 (8,000) 
Sale of a business, net of cash sold252,663
 
 
Acquisitions, net of cash received(50,544) 
 (73,422)
Purchases of property, equipment and software(15,598) (22,994) (31,127)
Capitalized website and software development costs(14,647) (14,191) (11,734)
Other adjustments(1,080) (922) 891
Net cash provided by (used in) investing activities79,899
 (55,572) (158,682)
FINANCING ACTIVITIES:     
Proceeds from issuance of common stock for employee stock-based plans40,917
 29,522
 21,166
Excess tax benefit from share-based award activity
 
 6,583
Taxes paid related to net share settlement of equity awards(1,199) 
 
Repurchases of common stock(12,556) 
 (482)
Contingent consideration payment
 
 (825)
Net cash provided by financing activities27,162
 29,522
 26,442
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS941
 (262) (821)
CHANGE IN CASH AND CASH EQUIVALENTS275,649
 100,588
 (75,699)
CASH AND CASH EQUIVALENTS—Beginning of period272,201
 171,613
 247,312
CASH AND CASH EQUIVALENTS—End of period$547,850
 $272,201
 $171,613
SUPPLEMENTAL DISCLOSURES OF OTHER CASH FLOW INFORMATION:     
Cash paid for income taxes, net of refunds$530
 $813
 $352
SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING AND FINANCING ACTIVITIES:     
Purchases of property, equipment and software recorded in accounts payable, accrued liabilities and long-term liabilities$11,493
 $989
 $2,233
Goodwill measurement period adjustment(178) 146
 (255)
Tax liability related to net share settlement of equity awards included in accrued liabilities(1,323) 
 
Issuance of common stock in connection with acquisition
 
 59,158

See notes to consolidated financial statements.

Yelp Inc.
F-8

Table of Contents
YELP INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
YEARS ENDED DECEMBER 31, 2017, 20162019, 2018 AND 20152017

1.ORGANIZATION AND DESCRIPTION OF BUSINESS
1. ORGANIZATION AND DESCRIPTION OF BUSINESS
Yelp Inc. was incorporated in Delaware on September 3, 2004. Except where specifically noted or the context otherwise requires, the use of terms such as the “Company” and “Yelp” in these Notes to Consolidated Financial Statements refers to Yelp Inc. and its subsidiaries.
Yelp connects peopleconsumers with great local businesses. Yelp’s trusted local platform delivers significant value to both consumers and businesses by bringing “word of mouth” onlinehelping each discover and providing a platform forinteract with the other: its content and transaction capabilities help consumers save time and money, while its advertising and other products help businesses gain visibility and consumers to engage and transact. Yelp’s platform is transforming the way people discover local businesses; every day, millions of consumers visit its website or use its mobile app to find great local businesses to meet their everyday needs. Businesses of all sizes use the Yelp platform to engage with consumers at the critical moment when they are deciding where to spend their money.its large audience of purchase-oriented consumers.
The Company consisted of Yelp Inc. and nine wholly-owned5 wholly owned entities as of December 31, 2017.2019: Yelp UK Ltd was incorporated on December 1, 2008,2008; Darwin Social Marketing Inc. (formerly Yelp Canada Inc.) was incorporated on February 24, 2009,2009; Yelp Ireland Limited was incorporated on May 31, 2010,2010; Yelp Ireland Holding Company Limited was incorporated on June 16, 2010,2010; and Yelp GmbH (formerly Qype GmbH) was acquired on October 23, 2012, Yelp Brazil Serviços de Marketing Ltda. was incorporated on May 29, 2013, and Darwin Sweden AB was incorporated on September 4, 2014. Nowait, LLC (the successor to Nowait, Inc.) was acquired on February 28, 2017 and subsequently dissolved on September 13, 2017.2012. Turnstyle Analytics Inc. and its subsidiary Turnstyle America, Inc. were, which was acquired on April 3, 2017, (see Note 8). Eat24, LLC (the successor to Eat24Hours.com,was combined with Darwin Social Marketing Inc.) ("Eat24"), which was acquired on February 9, 2015, was also a wholly-owned subsidiary of the Company until its disposal on October 10, 2017 (see Note 8).January 1, 2019. The financial results of these subsidiaries are included within the consolidated financial statements of the Company presented herein.
Basis of Presentation—The consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”). All intercompany balances and transactions have been eliminated upon consolidation. Certain prior period amounts have been reclassified to conform to the current period presentation, including the combining of accounts payable and accrued liabilities into one financial statement line item on the consolidated balance sheets, reclassifying deferred revenue to accounts payable, accrued liabilities and other liabilities on the consolidated statements of cash flows, and reclassifying capitalized website and software development costs to purchases of property, equipment and software on the consolidated statements of cash flows.
Certain Significant Risks and Uncertainties—The Company operates in a dynamic industry and, accordingly, canmay be affected by a variety of factors. For example, the Company’s management believes that changes in any of the following areas could have a significant negative impact on the Company in terms of its future financial position, results of operations or cash flows: rates of revenue growth; traffic to the Company’s websites and mobile applications and the number of reviews and advertisers they attract; the success of the Company's strategy; reliance on search engines and the placement and prominence in results rankings; the quality and reliability of reviews; scaling and adaptation of existing technology and network infrastructure; management of the Company’s growth; expansion of Yelp communities; protection of the Company’s brand, reputation and intellectual property; industry competition; qualified employees and key personnel; intellectual property infringement and other claims; and changes in government regulation affecting the Company’s business, among other things.

2.SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Use of Estimates—The preparation of the Company’s consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of income and expenses during the reporting period. These estimates are based on information available as of the date of the consolidated financial statements; therefore, actual results could differ from management’s estimates.
Foreign Currency Translation—The consolidated financial statements of the Company’s foreign subsidiaries are measured using the local currency as the functional currency. Assets and liabilities of foreign subsidiaries are translated at exchange rates in effect as of the balance sheet date. Revenues and expenses are translated at average exchange rates in effect during the year. Translation adjustments are recorded within accumulated other comprehensive income (loss),loss, a separate component of stockholders’ equity.
Cash and Cash Equivalents—The Company considers all highly liquid investments, such as treasury bills, commercial paper, certificates of deposit and money market instruments with maturities of three months or less at the time of acquisition to be cash equivalents. Cash and cash equivalents primarily consist of amounts held in interest-bearing money market funds that were readily convertible to cash. The fair value of cash and cash equivalents approximates their carrying value.
F-9

Table of Contents
Marketable SecuritiesThe Company has a policy that generally requires securities to be investment grade (i.e. rated ‘A+’ or higher by bond rating firms) with the objective of minimizing the potential risk of principal loss. In the event that the rating drops below that investment grade, the Company will sell the security prior to maturity. The Company determines the classification of its marketable securities at the time of purchase and re-evaluates these determinations at each balance sheet date. Debt securities are classified as held-to-maturity when the Company has the positive intent and ability to hold the securities to maturity. Held-to-maturity securities are stated at amortized cost and

are periodically assessed for other-than-temporary impairment. Amortized cost of debt securities is adjusted for amortization of premiums and accretion of discounts to maturity, and is included in interest income. The Company considers highly liquid treasury notes, U.S. agency securities, corporate debt securities, money market funds and other funds with maturities of more than three months to be marketable securities. Held-to-maturity securities with less than one year to maturity are included in short-term marketable securities. All other held-to-maturity securities are classified as long-term marketable securities.
Accounts Receivable, Net—The Company records accounts receivable at the amount invoiced or expected to be invoiced to the customer. The Company maintains an allowance for doubtful accounts; see the Concentrations of Credit Risk policy below for additional information on the Company's treatment of potentially uncollectible receivable amounts.
Concentrations of Credit Risk—Financial instruments that potentially subject the Company to concentration of credit risk consist primarily of cash and cash equivalents and accounts receivable. The Company places its cash and cash equivalents with major financial institutions, which management assesses to be of high credit quality, in order to limit the exposure of each investment.
Credit risk with respect to accounts receivable is dispersed due to the Company’s large number of customers. In addition, the Company’s credit risk is mitigated by the relatively short collection period. Collateral is not required for accounts receivable.
Accounts Receivable, Net and Payment Terms—The timing of revenue recognition may differ from the timing of invoicing to customers. The Company records an accounts receivable balance when revenue is recognized prior to or at the time of invoicing the customer. Payment terms and conditions vary by contract type and the service being provided. For advertising services, the Company typically invoices customers on a monthly basis, one month in arrears, with payment due either at the end of each billing period or up to 30 days after the end of the billing period. For transaction services, the Company collects its commission fee on each transaction either at the time of the transaction or up to 30 days after the end of the billing period. For subscription services, the Company typically invoices customers one month in advance, with payment due at the beginning of each billing period.
Allowance for Doubtful AccountsThe Company maintains an allowance for doubtful accounts receivable balances.receivable. The allowance reflects the Company's best estimate of probable losses associated with the accounts receivable balance. It is based upon historical experience and loss patterns, the number of days that billings are past due, and an evaluation of the potential risk of loss associated with delinquent accounts and known delinquent accounts. When new information becomes available that allows the Company to indicate that themore accurately estimate provided for the allowance, was incorrect,it makes an adjustment, which is considered a change in the estimate, is made.accounting estimate. The carrying value of accounts receivable approximates their fair value.
As of December 31, 2017, 2016 and 2015, there were no customersDeferred Contract Costs—The Company has determined that accounted for more than 10% of total accounts receivable.
The following table presentscertain sales incentive compensation costs are incremental costs to obtain the changesrelated contract. These costs are capitalized in the allowanceperiod in which they are incurred and amortized on a straight-line basis over the expected customer life of the associated contract. The Company uses a straight-line basis as it expects the benefit of these costs to be realized uniformly over the amortization period. The amortization periods for doubtful accounts (in thousands):contract costs, which extend up to 41 months, were determined based on both qualitative and quantitative factors, including product life cycle attributes and customer retention historical data. For contract costs with amortization periods of less than 12 months, the Company applies a practical expedient to expense such costs as incurred. The Company assesses deferred contract costs for impairment on a quarterly basis. Amortized contract costs are recorded within sales and marketing expense in the consolidated statements of operations. Deferred contract costs are included within other non-current assets on the Company's consolidated balance sheets (see Note 11,"Other Non-Current Assets").
Deferred Revenue—The Company records deferred revenue when it has received consideration, or has the right to receive consideration, in advance of the transfer of the performance obligations of the contract to the customer.
 Year Ended December 31,
 2017 2016 2015
Allowance for doubtful accounts:     
Balance, beginning of period$4,992
 $3,208
 $1,627
Add: bad debt expense16,883
 15,913
 10,271
Less: write-offs, net of recoveries(14,523) (14,129) (8,690)
Balance, end of period$7,352
 $4,992
 $3,208
Property, Equipment and Software—Property, equipment and software are stated at cost less accumulated depreciation and amortization. Depreciation is computed using the straight-line method over the estimated useful lives of the assets, which are approximately three to five years. Leasehold improvements are amortized over the shorter of the lease term or ten years. Following the disposition of an asset, the associated net cost is no longer recognized as an asset, and any gain or loss on the disposition is reflected in operating expenses.
Website and Internal-Use Software Development Costs—Costs related to website and internal-use software are primarily related to the Company’s website and mobile app, including support systems. The Company capitalizes its costs to develop
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software when preliminary development efforts are successfully completed, management has authorized and committed project funding and it is probable that the project will be completed and the software will be used as intended. Costs incurred for enhancements that are expected to result in additional material functionality are capitalized and amortized over the estimated useful life of the upgrades. Such costs are amortized on a straight-line basis over the estimated useful life of the related asset, which is generally three years.
Leases—The Company leases its office facilities under operating lease agreements that expire from 2020 to 2029, some of which include options to renew at the Company's sole discretion. If exercised, such options would extend the lease terms by up to ten years. Additionally, certain lease agreements contain options to terminate the leases, which require 6 to 12 months prior written notice to the landlord. The Company does not have any finance lease agreements.
The Company capitalized $20.4 million, $19.2 million and $14.7 million in website and internal-use software costs during the years ended December 31, 2017, 2016 and 2015, respectively, which are included in property, equipment and software, netrecognizes on theits consolidated balance sheets. Amortization expense related to websitesheet operating lease liabilities representing the present value of future lease payments, and internal-use software was $16.7 million, $12.3 million and $8.4 millionan associated operating lease right-of-use asset for the years ended December 31, 2017, 2016 and 2015, respectively.any operating lease with a term greater than one year. The Company wrote off an immaterial amount of website and internal-use software costs in eachrecognizes the amortization of the years ended December 31, 2017, 2016right-of-use asset each month within lease expense. The Company elected to use the practical expedient for short-term leases, and 2015, respectively.therefore does not record operating lease right-of-use assets or lease liabilities associated with leases with durations of 12 months or less.

When recording the present value of lease liabilities, a discount rate is required. The Company has concluded that the rates implicit in the various operating lease agreements are not readily determinable. As a result, the Company instead uses its incremental borrowing rate, which is calculated based on hypothetical borrowings to fund each respective lease over the lease term, as of the lease commencement date, assuming that borrowings are secured by the various leased properties. The incremental borrowing rates are determined based on an assessment of the Company’s implied credit rating, using ratings scales from reputable rating agencies that consider a number of qualitative and quantitative factors. Market rates are derived as of the lease commencement dates with reference to companies with the same debt rating that operate in a similar industry to the Company.

The Company does not recognize its renewal options as part of its right-of-use assets and lease liabilities until it is reasonably certain that it will exercise such renewal options.

The Company does not combine lease and non-lease components; its lease agreements provide specific allocations of the Company's obligations between lease and non-lease components. As a result, the Company is not required to exercise any judgment in determining such allocations.

Business Combinations—The Company accounts for acquisitions of entities that includeconsist of inputs and processes andthat have the ability to createcontribute to the creation of outputs as business combinations. The Company allocates the purchase price of the acquisition to the tangible assets, liabilities and identifiable intangible assets acquired based on their estimated fair values. The excess of the purchase price over those fair values is recorded as goodwill. Acquisition-related expenses and integration costs are expensed as incurred. During the measurement period, the Company records adjustments to the assets acquired and liabilities assumed with the corresponding offset to goodwill. After the measurement period, which could be up to one year after the transaction date, subsequent adjustments are recorded to the Company’s consolidated statements of operations.

Goodwill—Goodwill represents the excess of the purchase price in a business combination over the fair value of net tangible and intangible assets acquired. The carrying amount of goodwill is reviewed at least annually, or more frequently if events or changes in circumstances indicate that the carrying value of goodwill may not be recoverable. The Company has the option to first assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform the two-step goodwill impairment test under the authoritative guidance. If the Company determines that it is more likely than not that its fair value is less than the carrying amount, or opts not to perform a qualitative assessment, then the two-step goodwill impairment test will be performed. The first step, identifying a potential impairment, compares the fair value of the reporting unit with its carrying amount. If the carrying amount exceeds its fair value, the second step will be performed; otherwise, no further step is required. The second step, measuring the impairment loss, compares the implied fair value of the goodwill with the carrying amount of the goodwill. Any excess of the goodwill carrying amount over the applied fair value is recognized as an impairment loss, and the carrying value of goodwill is written down to fair value. No0 impairment charges associated with goodwill have been recorded by the Company to date.
Intangible Assets—Intangible assets include acquired intangible assets identified through business combinations, which are carried at fair value less accumulated amortization, and purchased intangible assets, which are carried at cost less accumulated amortization. Amortization is recorded over the estimated useful lives of the assets, generally two years to 12 years. The Company reviews amortizable intangible assets to be held and used for impairment whenever events or changes in
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circumstances indicate that the carrying value of the assets may not be recoverable. Determination of recoverability is based on the lowest level of identifiable estimated undiscounted cash flows resulting from the use of the asset and its eventual disposition. Measurement of any impairment loss is based on the excess of the carrying value of the asset over its fair value. NoNaN impairment charges have been recorded to date.
Cost-Method Investments—Non-marketable equity investments that the Company has determined do not meet the criteria for accounting under the equity method of accounting are accounted for using the cost method of accounting and classified within “Other non-current assets” on the consolidated balance sheets. Under the cost method, investments are carried at cost and are adjusted only for other-than-temporary declines in fair value, certain distributions and additional investments. The carrying amount of investments is reviewed if events or changes in circumstances indicate that the carrying value may not be recoverable.
Impairment of Long-Lived Assets and Long-Lived Assets to Be Disposed of—The Company evaluates its long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of such assets may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to future undiscounted net cash flows expected to be generated by the asset. If such assets are considered to be impaired, the impairment to be recognized is measured as the amount by which the carrying amount of the assets exceeds the fair value of the assets. Assets to be disposed of are reported at the lower of the carrying amount or fair value less costs to sell.
Stock Repurchases—The Company accounts for repurchases of its common stock by recording the cost to repurchase those shares to treasury stock, a separate component of stockholders' equity. Upon retirement, the carrying amount of treasury stock is removedreduced with a corresponding reduction to par value of common stock, with any excess of the cost incurred to repurchase shares over their par value recorded as an adjustment to retained earnings (accumulated deficit) on the date of retirement.
Assets and Liabilities Held for Sale—The Company considers an asset to be held for sale when: management approves and commits to a formal plan to actively market the asset for sale at a reasonable price in relation to its fair value; the asset is available for immediate sale in its present condition; an active program to locate a buyer and other actions required to complete the sale have been initiated; the sale of the asset is expected to be completed within one year; and it is unlikely that significant changes will be made to the plan. Upon designation as held for sale, the Company records the carrying value of the assets at the lower of its carrying value or its estimated fair value, less costs to sell. The Company ceases to record depreciation and amortization expense associated with assets upon their designation as held for sale.
Revenue Recognition—The Company generates revenue from itsthe sale of advertising products, transactions and other services, and, throughwhich correspond to the end of 2015, brand advertising.Company's major product lines. The Company recognizes revenue by applying the following steps: the contract with the customer is identified; the performance obligations in the contract are identified; the transaction price is determined; the transaction price is allocated to the performance obligations in the contract; and revenue is recognized when (or as) the Company satisfies these performance obligations in an amount that reflects the consideration it expects to be entitled to in exchange for those services. The Company applies the portfolio practical expedient to account for contracts with customers in each category of revenue. The Company does not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less and (ii) contracts for which revenue is recognized in the amount to which the Company has a right to invoice.
Contracts with customers can include multiple performance obligations, where the transaction price is allocated to each performance obligation based on its relative standalone selling price ("SSP"). The Company determines SSP based on the prices of the promised goods or services charged when sold separately to customers, which are determined using contractually stated prices. The Company allocates revenue to each of the performance obligations included in a contract with multiple performance obligations at the inception of the contract. The various products and services comprising contracts with multiple performance obligations are typically capable of being distinguished and accounted for as separate performance obligations.
For all contracts with customers, estimates and assumptions include determining variable consideration and identifying the nature and timing of satisfaction of performance obligations. Because the Company considers contracts month-to-month, variable consideration is resolved at the time of invoicing, which eliminates the use of estimates in determining the transaction price. For contracts satisfied over time, the Company applies the invoice practical expedient to depict the value transferred to the customer and measure of progress towards completion of its obligations. The Company considers the right to receive consideration from a customer to correspond directly with the value to the customer of its performance completed to date. The Company does not consider the effects of the time value of money as substantially all of the following conditionsCompany’s contracts are met: thereinvoiced on a monthly basis, one month in arrears.
Revenue is persuasive evidencerecognized net of any taxes collected from customers, which are remitted to governmental authorities. The Company does not typically refund customers for services once it determines the performance obligations of the contract have been satisfied, but will assess any refund requests from customers and partners on a case by case basis. The Company records an arrangement, service has been provided to the customer, the amount to be paid by the customerallowance for potential future refunds, which is fixed or determinable,estimated based on historical trends and collection is reasonably assured. Payments received in advance of services being rendered are recorded as deferred revenue and recognized over the requisite service period.a reduction of net revenue.
Advertising. The Company generates advertising revenue primarily through the display of advertising products on its website and mobile app. These arrangements are evidenced by either written or electronic acceptance of an agreementa contract that
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stipulates the types of advertising to be delivered, the timing and pricing. Performance-based advertising placements are priced on a cost-per-click basis, through an auction, while impression-based adsadvertising placements are delivered pursuant to fixed monthly fee advertising plans.priced on a cost per thousand impressions basis. The Company recognizes revenue from the delivery of performance-based ads and impression-based ads in the period of delivery, and from the delivery of impression-based ads over the service period, in each case net of customer discounts. The Company records a sales allowance foralso offers businesses premium features in connection with their business listing pages pursuant to fixed monthly fees, and recognizes revenue from such offerings over the service period.

potential refunds based on the Company’s estimate of future refunds. The Company also generates advertising revenue through indirect sales of advertising products, such as through reseller agreementscontracts that allow partners to sell Yelp Branded Profiles to their clients and the monetization of remnant advertising inventory through third-party ad networks.networks, and recognizes revenue in the period of delivery.
Transactions. The Company generates transactions revenue primarily from revenue-sharing partner arrangements, the sale of vouchers through the Company’s “Yelp Deals” and “Gift Certificates,”contracts and, through October 10, 2017, Yelp Eat24 as a standalone product.
Yelp Platform partnerships provideThe Company's transactions platform provides consumers with the ability to complete food delivery and other transactions through third parties directly on Yelp. The Company earns a per-transaction commission fee on Platform partnershipspursuant to partnership contracts for acting as an agent for these transactions, which it recordsrecognizes on a net basis and includes in revenue upon completion of a transaction.
Prior to the disposal of Eat24, the Company's Yelp Eat24 business generated revenue through arrangements with restaurants, in which restaurants paid a commission percentage fee on orders placed through the Yelp Eat24 platform. The Company recorded revenue associated with Yelp Eat24 transactions on a net basis.basis as the restaurant is primarily responsible for providing the underlying service and the Company does not control the service provided by the restaurant to the consumer. Concurrently with the disposal of Eat24 on October 10, 2017, the Company entered into a partnership agreement with Grubhub; as a result, following the sale, the Company will generategenerates revenue from transactions placed through the Eat24 restaurantGrubhub network, which are now part ofincludes the GrubhubEat24 restaurant network, that originate on the Yelp Platform.Yelp.
Yelp Deals allow merchants to promote themselves and offer discounted goods and services on a real-time basis to consumers directly on the Company’s website and mobile app. The Company earns a fee on Yelp Deals for acting as an agent in these transactions, which it records on a net basis and includes in revenue upon sale of the deal. The Company records a sales allowance for potential Yelp Deals refunds based on the Company’s estimate of future refunds. Gift Certificates allow merchants to sell full-priced gift certificates directly to consumers through their business listing pages. The Company earns a fee based on the amount of the Gift Certificate sold, which it records on a net basis and includes in revenue upon a consumer’s purchase of the Gift Certificate.
Other Services. The Company generates other services revenue through subscription services contracts, such as sales of monthly subscriptions to its Yelp Reservations Yelp Nowait and Yelp WiFi Marketing products,Waitlist, licensing paymentscontracts for access to Yelp data, and other non-advertising, non-transaction partnerships. Subscription revenues are recognized ratably over the contract terms beginning on the commencement date of each contract, which is the date the service is made available to customers.
Brand Advertising. Through the end of 2015, the Company generated brand advertising revenue through the sale of graphic and text display advertisements on its website. The Company recognized revenue from the sale of impression-based advertisements on its online network in the period in which the advertisements were delivered, net of customer discounts. The Company also generated brand revenue from fixed-price brand sponsorships that were recognized ratably over the service period. The arrangements were evidenced by insertion orders or contracts that stipulated the types of advertising delivered and the pricing.
Multiple Element Arrangements. The Company enters into arrangements with its customers to sell advertising packages that include different media placements or ad services that are delivered at the same time, or within close proximity of one another.
The Company allocates arrangement consideration in multiple-deliverable arrangements at the inception of the arrangement to all deliverables or those packages in which all components of the package are delivered at the same time, based on the relative selling price method in accordance with the selling price hierarchy, which includes: (1) vendor-specific objective evidence (“VSOE”), if available; (2) third-party evidence (“TPE”), if VSOE is not available; and (3)best estimate of selling price (“BESP”), if neither VSOE nor TPE is available.
VSOE—The Company determines VSOE based on its historical pricing and discounting practices for the specific product or service when sold separately. In determining VSOE, the Company requires that a substantial majority of the standalone selling prices for these services fall within a reasonably narrow price range; however, the Company has not historically sold a large volume of advertising products on a standalone basis. As a result, the Company has not been able to establish VSOE for any of its advertising products.
TPE—When VSOE cannot be established for deliverables in multiple element arrangements, the Company applies judgment with respect to whether it can establish a selling price based on TPE. TPE is determined based on competitor prices for similar deliverables when sold separately. Generally, the Company’s go-to-market strategy differs from that of its peers and its offerings contain a significant level of differentiation such that the comparable pricing of services cannot be obtained. Furthermore, the Company is unable to reliably determine what similar competitor services’ selling prices are on a standalone basis. As a result, the Company has not been able to establish selling price based on TPE.
BESP—When it is unable to establish selling price using VSOE or TPE, the Company uses BESP in its allocation of arrangement consideration. The objective of BESP is to determine the price at which the Company would transact a sale if the service were sold on a standalone basis. BESP is generally used to allocate the selling price to deliverables in the Company’s multiple element

arrangements. The Company determines BESP for deliverables by considering multiple factors including, but not limited to, prices it charges for similar offerings, market conditions, competitive landscape and pricing practices. The Company limits the amount of allocable arrangement consideration to amounts that are fixed or determinable and that are not contingent on future performance or future deliverables. The Company will regularly review BESP. Changes in assumptions or judgments or changes to elements in the arrangement could cause a material increase or decrease in the amount of revenue that the Company reports in a particular period.
The Company recognizes the relative fair value of the media placements or ad services as they are delivered, assuming all other revenue recognition criteria are met.
Cost of Revenue—The Company’s cost of revenue primarily consists of credit card processing fees, web hosting costs, and salaries, benefits and stock-based compensation expense for its infrastructure teams related to operating the Company’s website and mobile app. It also includes confirmation services expenses and delivery relateddelivery-related costs as well as video production expenses. All costs are expensed when incurred.
Research and Development—The Company incurs research and development expenses for costs it incurs in research aimed at developing, and in translating the results of such research into new products and services or significant improvements to existing products or services, whether intended for sale or for internal use. Such costs are considered research and development expense up to the point in time at which the product or service achieves technological feasibility. These expenses primarily consist of employee relatedemployee-related costs (including stock-based compensation) for ourthe Company's engineers and other employees engaged in the research and development of ourits products and services, as well as allocated indirect overhead costs. Research and development costs were $171.2$225.5 million, $133.1$205.8 million and $104.7$171.2 million for the years ended December 31, 2017, 20162019, 2018 and 2015,2017, respectively, and are recorded to costs and expenses in the consolidated statements of operations for those periods, primarily within product development costs.
Stock-Based Compensation—The Company accounts for stock-based employee compensation plans under the fair value recognition and measurement provisions, in accordance with applicable accounting standards, which require all stock-based payments to employees, including grants of stock options, restricted stock awards, restricted stock units ("RSUs"), performance-based restricted stock units ("PRSUs") and issuances under its 2012 Employee Stock Purchase Plan, as amended (“ESPP”), to be measured based on the grant-date fair value of the awards.
Prior to January 1, 2016, stock-based compensation expense was recorded net of estimated forfeitures in the Company’s consolidated statements of income (loss) and, accordingly, was recorded for only those stock-based awards that the Company expected to vest. The Company estimated the forfeiture rate based on historical forfeitures of equity awards and adjusted the rate to reflect changes in facts and circumstances, if any. The Company revised its estimated forfeiture rate if actual forfeitures differed from its initial estimates.
Effective as of January 1, 2016, the Company adopted a change in accounting policy in accordance with Accounting Standards Update No. 2016-09, “Compensation—Stock Compensation (Topic 718)” (“ASU 2016-09”) to accountaccounts for forfeitures as they occur.
The change was appliedfair value of options granted to employees is estimated on the grant date using the Black-Scholes-Merton option valuation model. This valuation model for stock-based compensation expense requires the Company to make assumptions and judgments about the variables used in the calculation, including the expected term (weighted-average period of time that the options granted are expected to be outstanding), the expected volatility in the fair market value of the Company’s common stock, a modified retrospective basisrisk-free interest rate and expected dividends. No compensation cost is recorded for options that do not vest. The Company uses the simplified calculation of expected life as the contractual term for options of 10 years is longer than the Company has been publicly traded. Expected volatility is based on an average of the historical volatilities of the common stock of several entities with a cumulativecharacteristics similar to those of the Company. The risk-free rate is based on the U.S. Treasury yield curve in effect adjustmentat the time of grant for periods corresponding with the expected life of the option. The Company uses the straight-line method for expense attribution.
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The fair value of RSUs is measured using to retained earningsthe closing price of $1.1 million (which reduced the accumulated deficit)Company's common stock on the New York Stock Exchange on the grant date. The Company uses the straight-line method for expense attribution. No compensation cost is recorded for RSUs that do not vest. Shares for these grants are issued upon vesting, net of tax withholding to be paid by the Company on behalf of its employees.
The vesting of PRSUs outstanding as of January 1, 2016. No prior periods were recast asDecember 31, 2019 was subject to both a market performance condition and a time-based vesting schedule. As a result of this change in accounting policy.these multiple vesting requirements, the Company uses a Monte Carlo model to determine the fair value of the PRSUs. The Company uses the accelerated method for expense attribution. Compensation costs are recorded if the service condition is met regardless of whether the market performance condition is satisfied. No compensation cost is recorded if the service condition is not met.
Advertising Expenses—Advertising costs are expensed in the period in which the advertising takes place. Costs of producing advertising are expensed in the period in which production takes place. Total advertising expenses incurred were $50.3$20.7 million, $46.9$38.0 million and $30.9$50.3 million for the years ended December 31, 2019, 2018 and 2017, 2016 and 2015, respectively.
Comprehensive Income (Loss)—Comprehensive income (loss) consists of net income (loss) and other comprehensive (loss) income, (loss), which includes certain changes in equity that are excluded from net income (loss). Specifically, it includesconsists of foreign currency translation adjustments.
Income Taxes—The Company records income taxes using the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been recognized in the Company’s financial statements or tax returns. In estimating future tax consequences, the Company generally considers all expected future events other than enactments or changes in the tax law or rates are considered.rates. In assessing the realization of deferred tax assets, the Company considers whether it is more likely than not that all or some portion of deferred tax assets will not be realized. The ultimate realization of the deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Valuation allowances are provided to reduce deferred tax assets to the amount that is more likely than not to be realized. In determining the need for a valuation allowance, the weight given to positive and negative evidence is commensurate with the extent to which the evidence may be objectively verified. The Company evaluates the ability to realize net deferred tax assets and the related valuation allowance on a quarterly basis.

The Company operates in various tax jurisdictions and is subject to audit by various tax authorities. The Company provides for tax contingencies whenever it is deemed probable that a tax asset has been impaired or a tax liability has been incurred for events such as tax claims or changes in tax laws. Tax contingencies are based upon their technical merits, relative tax law and the specific facts and circumstances as of each reporting period. Changes in facts and circumstances could result in material changes to the amounts recorded for such tax contingencies.
The Company recognizes a tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities based on the technical merits of the position. The tax benefits recognized in the financial statements from such a position are then measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement.
Effective as of January 1, 2016, the Company early adopted a change in accounting policy in accordance with ASU 2016-09, which eliminated the requirement that excess tax benefits be realized as a reduction in current taxes payable before the associated tax benefit could be recognized as an increase in paid in capital. Additionally, ASU 2016-09 addresses the presentation of excess tax benefits and employee taxes paid on the statement of cash flows. The Company is now required to present excess tax benefits as an operating activity in the same manner as other cash flows related to income taxes on the statement of cash flows rather than as a financing activity. The Company adopted this change prospectively.
Employee Benefit Plan—The Company sponsors a qualified 401(k) defined contribution plan covering eligible employees. Participants may contribute a portion of their annual compensation up to a maximum annual amount set by the Internal Revenue Service (“IRS”). Employer contributions under this plan were $4.8$9.5 million, $3.8$12.0 million and $2.9$4.8 million for the years ended December 31, 2019, 2018 and 2017, 2016respectively.
Insurance—The Company is self-insured for certain employee benefits include medical, detail and 2015, respectively.vision; however, the Company obtains third-party excess insurance coverage to limit its exposure to certain claims. Liabilities associated with these benefits include estimates of both claims filed and losses incurred but not yet reported. The Company utilizes valuations provided by reputable, independent third-party actuaries. The Company's self-insured liabilities are included in the consolidated balance sheets within accounts payable and accrued liabilities.
RecentRecently Adopted Accounting Pronouncements Not Yet Effective
Lease Accounting—In May 2014,February 2016, the Financial Accounting Standards Board (“FASB” ("FASB") issued Accounting Standards Update No. 2014-09, “Revenue from Contracts with Customers2016-02, "Leases (Topic 606)” (“ASU 2014-09”842)" ("ASC 842"). ASU 2014-09ASC 842 supersedes the revenue recognition requirements in Revenue Recognition (Topic 605), and will require entities to recognize revenue when they transfer promised goods or services to customers, in an amount that reflects the consideration that the entity expects to be entitled to in exchangeprevious accounting guidance for such goods or services. ASU 2014-09 also modified Subtopicleases included within Accounting Standards Codification 340-40, “Other Assets840, "Leases" ("ASC 840"). The new guidance generally requires lessees to recognize operating and Deferred Costs—Contractsfinancial lease liabilities and corresponding right-of-use assets on the balance sheet and to provide enhanced disclosures on the amount, timing and uncertainty of cash flows arising from lease arrangements.

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The Company adopted and began applying ASC 842 on January 1, 2019 in accordance with Customers,”Accounting Standards Update No. 2018-11, "Targeted Improvements to ASC 842," using a modified retrospective approach. Based on its lease portfolio in place at the time of adoption, the Company determined that a cumulative-effect adjustment to the opening balance of accumulated deficit was not needed because there was no difference between the operating lease expense recorded to its condensed consolidated statement of operations following its adoption of ASC 842 and the amount that would have been recorded under ASC 840. The Company will continue to disclose comparative reporting periods prior to January 1, 2019 under ASC 840.
The Company elected the practical expedient available under ASC 842 to not record operating lease right-of-use assets or lease liabilities associated with leases with durations of 12 months or less. Those leases will be recorded on a straight line basis to the consolidated statement of operations over the lease term. The Company recorded operating lease right-of-use assets and lease liabilities for all of its leases that met the definition of a lease under ASC 842 and that had terms of greater than 12 months in duration upon its adoption of ASC 842.
The Company elected not to take the package of practical expedients permitted under the transition guidance within ASC 842, which will requireallows an entity to not reassess whether any expired or existing contracts contain leases, the deferrallease classification for any expired or existing leases, and treatment of incrementalinitial direct costs for any existing leases. Additionally, the Company did not elect the hindsight practical expedient to determine the lease terms for existing leases.
The most significant changes as a result of obtainingASC 842 were the recognition on the Company's consolidated balance sheet upon adoption on January 1, 2019 of operating lease right-of-use assets of $233.0 million, current operating lease liabilities of $55.2 million and long-term operating lease liabilities of $212.5 million. These balances consist of the Company's office lease portfolio and, to a contractmuch lesser extent, its computer equipment lease portfolio. The Company de-recognized deferred rent liabilities associated with its office lease portfolio of $34.8 million upon adoption.
Callable Debt Securities—In March 2017, FASB issued Accounting Standards Update No. 2017-08, "Receivables—Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities" ("ASU 2017-08"). ASU 2017-08 requires entities to amortize purchased callable debt securities held at a customer.premium to the earliest call date. The Company adopted ASU 2014-092017-08 effective January 1, 2018.
The new standard permits two methods of adoption: retrospectively to each prior reporting period presented (full retrospective method), or retrospectively with the cumulative effect of the initial application of the guidance recognized at the date of adoption (modified retrospective method). The Company is adopting the standard2019 using the fullmodified retrospective method. The Company does not expecthold any callable debt securities at a premium upon the adoption of date, and, accordingly, no adjustment to opening retained earnings was required.
Non-Employee Share-Based Payment Accounting—In June 2018, FASB issued Accounting Standards Update No. 2018-07, "Compensation—Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting" ("ASU 2014-09 will result in a significant change2018-07"). ASU 2018-07 changes the accounting for non-employee share-based payments to its revenue recognition, except that certain customer contracts that did not meetalign with the prescribed revenue recognition criteria under the prior guidance would be recognized as revenue under ASU 2014-09, with a corresponding bad debt expense recorded to general and administrative costs. In addition, the requirement to defer incremental contract acquisition costs and recognize them over the expected contract term or expected customer life will result in the recognition of a deferred contract cost asset on the Company's consolidated balance sheets.accounting for employee stock compensation. The Company expensed such costs in the period in which they were incurred under the prior guidance. The expected amortization periods for contract costs, which extend up to 41 months, were calculated based on both qualitative and quantitative factors, including product lifecycle attributes and customer retention using historical data. For amortization periods that are less than 12 months, the Company will elect to apply a practical expedient, which allows such costs to be expensed as incurred. 
The Company expects its adoption ofadopted ASU 2014-09 to result in the recognition of additional revenue and a corresponding increase in general and administrative costs of $4.0 million and $3.0 million for years ended December 31, 2017 and 2016, respectively. The cumulative impact of deferred contract costs at2018-07 effective January 1, 2016 is expected to result in an increase in retained earnings of $6.0 million, with a corresponding deferred contract cost asset recorded. An additional $11.3 million2019, and $10.6 million of deferred contract costs are expected to be recorded for the years ended December 31, 2017 and 2016, respectively. The additional deferred contract cost asset will be offset by straight line amortization of $10.1 million and $7.7 million for the years ended December 31, 2017, and 2016, respectively. This treatment of contract costs will result in a net decrease in sales and marketing expenses of $1.2 million and $2.9 million for the years ended December 31, 2017, and 2016, respectively. The gain on disposal of business unit will decrease by $1.1 million for the year ended December 31, 2017, as a result of the deferred contract cost asset balance on the date of disposal. Due to the Company's valuation allowance on U.S. deferred tax assets, the adoption of the standard isdid not expected to have a material impact on its consolidated financial statements.
Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income—In February 2018, FASB issued Accounting Standards Update No. 2018-02, "Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income" ("ASU 2018-02"). This new guidance permits a company to reclassify the income tax impact.effects of the U.S. Tax Cuts and Jobs Act on items within accumulated other comprehensive income to retained earnings. ASU 2018-02 is effective for all entities for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. The Company adopted ASU 2018-02 effective January 1, 2019 and elected to not reclassify the income tax effects of the U.S. Tax Cuts and Jobs Act from accumulated other comprehensive income to retained earnings.
Recent Accounting Pronouncements Not Yet Effective
In FebruaryJune 2016, FASB issued Accounting Standards Update No. 2016-02, “Leases”2016-13, “Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” (“ASU 2016-02”2016-13”). ASU 2016-13 requires certain types of financial instruments, including trade receivables and held-to-maturity investments measured at amortized cost, to be presented at the net amount expected to be collected based on historical events, current conditions and forecast information. The new guidance generally requiresCompany adopted and began applying ASU 2016-13 on January 1, 2020 by recording a cumulative-effect adjustment to retained earnings. This adjustment recorded an entityallowance related to recognizeexpected credit losses on its balance sheet operatingheld-to-maturity debt securities. This allowance took into consideration the composition and financing lease liabilitiescredit quality of the financial instruments, their respective historical credit loss activity, and corresponding right-of-use assets.reasonable and supportable economic forecasts and conditions at the time of adoption. The standard will be effective for the first interim period within annual reporting periods beginning after December 15, 2018 and early adoption is permitted. The new standard requiresdid not have a modified retrospective transition for existing leases to each

prior reporting period presented. Although the Company is in the process of evaluating thematerial impact of adoption of ASU 2016-02 on its consolidated financial statements, the Company currently expects the most significant changes will be related to the recognition of new right-of-use assets and lease liabilities on the Company's consolidated balance sheet for real estate operating leases.financial statements.
In August 2016, FASB issued Accounting Standards Update No. 2016-15, “Statement
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Table of Cash Flows (Subtopic 230)” (“ASU 2016-15”). The new guidance provides clarity around the cash flow classification for specific issues in an effort to reduce the current and potential future diversity in practice. The standard will be effective for the first interim period within annual reporting periods beginning after December 15, 2017 and early adoption is permitted. The Company will adopt ASU 2016-15 in the first quarter of 2018 and does not expect the impact on its consolidated financial statements to be material.Contents
In November 2016, FASB issued Accounting Standards Update No. 2016-18, “Statement of Cash Flows (Subtopic 230)” (“ASU 2016-18”). The new guidance requires that the statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. The standard will be effective for the first interim period within annual reporting periods beginning after December 15, 2017 and early adoption is permitted. The Company will adopt ASU 2016-18 in the first quarter of 2018 and does not expect the impact on its consolidated financial statements to be material.

In January 2017, FASB issued Accounting Standards Update No. 2017-04, “Intangibles—"Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment” (“Impairment" ("ASU 2017-04”2017-04"). This new guidanceASU 2017-04 simplifies the subsequent measurement of goodwill by eliminating Step 2 from the goodwill impairment test. Under the new guidance,standard, entities will perform goodwill impairment tests by comparing the fair value of a reporting unit with its carrying amount and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. The standard will be effective for the first interim period within annual reporting periods beginning after December 15, 2019 and early adoption is permitted.2019. The Company is currently evaluating the impactadopted ASU 2017-04 on January 1, 2020 and timing of the adoption of ASU 2017-04, but expects that it willdid not have a material impact on its consolidated financial statements.

In March 2017,August 2018, FASB issued Accounting Standards Update No. 2017-08, “Receivables—Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities” (“ASU 2017-08”). This new guidance requires entities to amortize purchased callable debt securities held at a premium2018-13, "Disclosure Framework—Changes to the earliest call date.Disclosure Requirements for Fair Value Measurement" (“ASU 2018-13”), which amends Accounting Standards Codification 820, "Fair Value Measurement." ASU 2018-13 modifies the disclosure requirements for fair value measurements by removing, modifying and adding certain disclosures. The standard will be effective for the first interim period within annual reporting periods beginning after December 15, 2018 and early adoption is permitted.2019. The Company does not expectadopted ASU 2018-13 on January 1, 2020 and the adoption of ASU 2017-08 todid not have a material impact on its consolidated financial statements.
In August 2018, FASB issued Accounting Standards Update No. 2018-15, "Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract" ("ASU 2018-15"). ASU 2018-15 requires a customer in a cloud computing arrangement that is a service contract to follow the internal-use software guidance in Accounting Standards Codification 350-40 to determine which implementation costs to defer and recognize as an asset. ASU 2018-15 generally aligns the guidance on recognizing implementation costs incurred in a cloud computing arrangement that is a service contract with that for implementation costs incurred to develop or obtain internal-use software, including hosting arrangements that include an internal-use software license. The Company adopted ASU 2018-15 prospectively and began applying it on January 1, 2020. The adoption did not have a material impact on the Company's financial statements.
In December 2019, FASB issued Accounting Standards Update No. 2019-12, Income Taxes (Topic 740): “Simplifying the Accounting for Income Taxes” (“ASU 2019-12”), which simplifies the accounting for income taxes by removing certain exceptions to the general principles for recording income taxes, while also simplifying certain recognition and allocation approaches to accounting for income taxes. ASU 2019-12 will be effective for the first interim period within annual periods beginning after December 15, 2020 on a prospective basis, and early adoption is permitted. The Company is currently evaluating the impact of ASU 2019-12 on its consolidated financial statements and related disclosures.

3. CASH, AND CASH EQUIVALENTS AND RESTRICTED CASH
Cash, and cash equivalents and restricted cash as of December 31, 20172019 and 20162018 consisted of the following (in thousands):
December 31,
2019
December 31,
2018
December 31,
2017
 December 31,
2016
Cash and cash equivalents:   
Cash$283,085
 $119,778
Cash$43,581  $81,055  
Cash equivalents264,765
 152,423
Cash equivalents126,700  251,709  
Total cash and cash equivalents$547,850
 $272,201
Total cash and cash equivalents170,281  332,764  
Restricted cashRestricted cash22,037  22,071  
Total cash, cash equivalents and restricted cashTotal cash, cash equivalents and restricted cash$192,318  $354,835  
As of December 31, 20172019 and 2016,2018, the Company had letters of credit collateralized fully by bank deposits which total $18.6totaled $22.0 million and $17.3$22.1 million, respectively. These letters of credit primarily relate to lease agreements for certain of the Company’s offices, which are required to be maintained and issued to the landlords of each facility. Each letter of credit is subject to renewal annually until the applicable lease expires. As the bank deposits have restrictions on their use, they are classified as restricted cash on the Company's consolidated balance sheets.

4. FAIR VALUE OF FINANCIAL INSTRUMENTS
The Company’s investments in money market accounts are recorded as cash equivalents at fair value in the consolidated financial statements.balance sheets. All other financial instruments are classified as held-to-maturity investments and, accordingly, are recorded at amortized cost; however, the Company is required to determine the fair value of these investments on a recurring basis to identify any potential impairment. The accounting guidance for fair value measurements prioritizes the inputs used in measuring fair value in the following hierarchy:
Level 1—Observable inputs, such as quoted prices in active markets,

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Level 2—Inputs other than quoted prices in active markets that are observable either directly or indirectly, or
Level 3—Unobservable inputs in which there are little or no market data, which require the Company to develop its own assumptions.
This hierarchy requires the Company to use observable market data, when available, to minimize the use of unobservable inputs when determining fair value. The Company’s money market funds are classified within Level 1 of the fair value hierarchy because they are valued using quoted prices in active markets. The Company’s commercial paper, corporate bonds, agencyU.S. government bonds and agency discount notesbonds are classified within Level 2 of the fair value hierarchy because they have been valued using inputs other than quoted prices in active markets that are observable directly or indirectly.
The following table represents the fair value of the Company’s financial instruments, including those measured at fair value on a recurring basis and those held-to-maturity, as of December 31, 20172019 and 20162018 (in thousands):
December 31, 2019December 31, 2018
Level 1Level 2Level 3TotalLevel 1Level 2Level 3Total
Cash Equivalents:
Money market funds$126,700  $—  $—  $126,700  $221,173  $—  $—  $221,173  
Commercial paper—  —  —  —  —  30,536  —  30,536  
Marketable Securities:
Commercial paper—  130,472  —  130,472  —  175,070  —  175,070  
Corporate bonds—  85,611  —  85,611  —  131,496  —  131,496  
Agency bonds—  79,750  —  79,750  —  50,846  —  50,846  
U.S. government bonds—  —  —  —  —  65,502  —  65,502  
Total cash equivalents and marketable securities$126,700  $295,833  $—  $422,533  $221,173  $453,450  $—  $674,623  
During the year ended December 31, 2018, the Company sold a security (with an expected maturity date of May 17, 2019) that had been classified as a held-to-maturity short-term marketable security on the Company's consolidated balance sheet prior to its sale. On October 29, 2018, a reputable ratings agency downgraded the security from "A+" to "A." Because the Company has a policy of maintaining securities that are at an investment grade of A+ or above, it sold the security on October 31, 2018. The security was carried at amortized cost of $18.0 million as of October 29, 2018 and the Company recorded a loss of $0.1 million upon its sale, which was recorded in other income, net on the Company's consolidated statement of operations for the year ended December 31, 2018.


 December 31, 2017 December 31, 2016
 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total
Cash Equivalents:               
Money market funds$217,838
 $
 $
 $217,838
 $152,423
 $
 $
 $152,423
Commercial paper
 46,927
 
 46,927
 
 
 
 
Marketable Securities:               
Commercial paper
 138,412
 
 138,412
 
 45,894
 
 45,894
Agency bonds
 78,913
 
 78,913
 
 152,394
 
 152,394
Corporate bonds
 69,926
 
 69,926
 
 9,006
 
 9,006
Agency discount notes
 10,989
 
 10,989
 
 
 
 
Total cash equivalents and marketable securities$217,838
 $345,167
 $
 $563,005
 $152,423
 $207,294
 $
 $359,717
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5. MARKETABLE SECURITIES
The amortized cost, gross unrealized gains and losses, and fair value of securities held-to-maturity as of December 31, 20172019 and 20162018 were as follows (in thousands):
December 31, 2019
Amortized CostGross Unrealized GainsGross Unrealized LossesFair Value
 As of December 31, 2017
   Gross Gross  
   Unrealized Unrealized  
Short-term marketable securities:

 Amortized Cost Gains Losses Fair ValueShort-term marketable securities:
Commercial paper $138,412
 $1
 $(1) $138,412
Commercial paper$130,464  $17  $(9) $130,472  
Corporate bondsCorporate bonds85,396  225  (10) 85,611  
Agency bonds 78,958
 
 (45) 78,913
Agency bonds26,140  90  —  26,230  
Corporate bonds 45,006
 
 (41) 44,965
Agency discount bonds 10,990
 
 (1) 10,989
Total short-term marketable securities $273,366
 $1
 $(88) $273,279
Total short-term marketable securities242,000  332  (19) 242,313  
Long-term marketable securities:        Long-term marketable securities:
Corporate bonds $25,032
 $
 $(71) $24,961
Agency bondsAgency bonds53,499  21  —  53,520  
Total long-term marketable securities $25,032
 $
 $(71) $24,961
Total long-term marketable securities53,499  21  —  53,520  
Total marketable securities $298,398
 $1
 $(159) $298,240
Total marketable securities$295,499  $353  $(19) $295,833  
        
 As of December 31, 2016December 31, 2018
   Gross Gross  Amortized CostGross Unrealized GainsGross Unrealized LossesFair Value
   Unrealized Unrealized  


Cash equivalents:Cash equivalents:
Commercial paperCommercial paper$30,536  $—  $—  $30,536  
Total cash equivalentsTotal cash equivalents30,536  —  —  30,536  
Short-term marketable securities:

 Amortized Cost Gains Losses Fair ValueShort-term marketable securities:
Agency bonds $152,429
 $18
 $(53) $152,394
Commercial paper 45,894
 
 
 45,894
Commercial paper175,070  —  —  175,070  
Corporate bonds 9,009
 
 (3) 9,006
Corporate bonds131,626   (138) 131,496  
U.S. government bondsU.S. government bonds65,513  —  (11) 65,502  
Agency bondsAgency bonds50,887  —  (41) 50,846  
Total short-term marketable securitiesTotal short-term marketable securities423,096   (190) 422,914  
Total marketable securities $207,332
 $18
 $(56) $207,294
Total marketable securities$453,632  $ $(190) $453,450  
The following tables present gross unrealized losses and fair values for those securities that were in an unrealized loss position as of December 31, 20172019 and 2016,2018, aggregated by investment category and the length of time that the individual securities have been in a continuous loss position (in thousands):
December 31, 2019
Less Than 12 Months12 Months or GreaterTotal
Fair ValueUnrealized LossFair ValueUnrealized LossFair ValueUnrealized Loss
Commercial paperCommercial paper$63,639  $(9) $—  $—  $63,639  $(9) 
Corporate bondsCorporate bonds20,979  (10) —  —  20,979  (10) 
TotalTotal$84,618  $(19) $—  $—  $84,618  $(19) 
December 31, 2018
As of December 31, 2017Less Than 12 Months12 Months or GreaterTotal
Less Than 12 Months 12 Months or Greater TotalFair ValueUnrealized LossFair ValueUnrealized LossFair ValueUnrealized Loss
Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss
Corporate bondsCorporate bonds$121,566  $(138) $—  $—  $121,566  $(138) 
U.S. government bondsU.S. government bonds65,502  (11) —  —  65,502  (11) 
Agency bonds$78,913
 $(45) $
 $
 $78,913
 $(45)Agency bonds50,846  (41) —  —  50,846  (41) 
Corporate bonds62,927
 (112) 
 
 62,927
 (112)
Agency discount notes10,989
 (1) 
 
 10,989
 (1)
Commercial paper3,975
 (1) 
 
 3,975
 (1)
Total$156,804
 $(159) $
 $
 $156,804
 $(159)Total$237,914  $(190) $—  $—  $237,914  $(190) 
           
As of December 31, 2016
Less Than 12 Months 12 Months or Greater Total
Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss
Agency bonds$92,018
 $(53) $
 $
 $92,018
 $(53)
Corporate bonds8,006
 (3) 
 
 8,006
 (3)
Total$100,024
 $(56) $
 $
 $100,024
 $(56)
The Company periodically reviews its investment portfolio for other-than-temporary impairment. The Company considers such factors as the duration, severity and reason for the decline in value, and the potential recovery period. The Company also considers whether it is more likely than not that it will be required to sell the securities before the recovery of their amortized cost basis, and whether the amortized cost basis cannot be recovered as a result of credit losses. During the years ended December 31, 20172019, 2018 and 2016, respectively,2017, the Company did not recognize any other-than-temporary impairment loss.
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6. PREPAID EXPENSES AND OTHER CURRENT ASSETS
Prepaid expenses and other current assets as of December 31, 2019 and December 31, 2018 consisted of the following (in thousands):
December 31, 2019December 31, 2018
Prepaid expenses$10,188  $9,436  
Other current assets4,008  7,668  
Total prepaid expenses and other current assets$14,196  $17,104  

7. PROPERTY, EQUIPMENT AND SOFTWARE, NET
The Company capitalized $33.9 million, $26.9 million and $20.4 million in website and internal-use software costs during the years ended December 31, 2019, 2018 and 2017, respectively, which are included in property, equipment and software, net on the consolidated balance sheets. Amortization expense related to capitalized website and internal-use software was $24.2 million, $19.0 million and $16.7 million for the years ended December 31, 2019, 2018 and 2017, respectively. The Company wrote off $1.6 million of capitalized website and internal-use software costs in the year ended December 31, 2019, and wrote off an immaterial amount in each of the years ended December 31, 2018 and 2017.
Property, equipment and software, net as of December 31, 20172019 and 20162018 consisted of the following (in thousands):
December 31,
2017
 December 31,
2016
December 31,
2019
December 31,
2018
Capitalized website and internal-use software development costs

$81,710
 $61,515
Capitalized website and internal-use software development costs

$140,886  $108,590  
Leasehold improvements

74,236
 60,101
Leasehold improvements

86,089  83,811  
Computer equipment32,450
 28,551
Computer equipment43,626  40,801  
Furniture and fixtures16,435
 14,162
Furniture and fixtures18,403  17,839  
Telecommunication3,996
 3,457
Telecommunication5,154  4,691  
Software1,212
 1,079
Software1,687  1,651  
Total210,039
 168,865
Total295,845  257,383  
Less accumulated depreciation(106,388) (76,425)Less accumulated depreciation(184,896) (142,583) 
Property, equipment and software, net$103,651
 $92,440
Property, equipment and software, net$110,949  $114,800  
Depreciation expense for the years ended December 31, 2017, 20162019, 2018 and 20152017 was approximately $34.6$46.1 million, $28.5$39.3 million and $23.0$34.6 million, respectively.

7.
8. GOODWILL AND INTANGIBLE ASSETS
The Company’s goodwill is the result of its acquisitions of other businesses, and represents the excess of purchase consideration over the fair value of assets and liabilities acquired. The Company performedcompleted its annual goodwill impairment analysis during the three months ended September 30, 2017on August 31, 2019 and concluded that goodwill was not impaired, as the fair value of each reporting unit exceeded its carrying value.
Goodwill as of December 31, 20172019 and 2016,2018, and changes in the carrying amount of goodwill during the years ended December 31, 20172019 and 2016,2018, were as follows (in thousands):

20192018
Balance, beginning of period$105,620  $107,954  
Effect of currency translation(1,031) (2,334) 
Balance, end of period$104,589  $105,620  
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Balance as of December 31, 2015$172,197
Goodwill measurement period adjustment146
Effect of currency translation(1,676)
Balance as of December 31, 2016$170,667
Goodwill acquired42,007
Goodwill measurement period adjustment(178)
Goodwill related to disposed asset group(110,768)
Effect of currency translation6,226
Balance as of December 31, 2017$107,954
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Intangible assets at December 31, 20172019 and 20162018 consisted of the following (dollars in thousands):
As of December 31, 2019
Gross
Carrying
Amount
Accumulated
Amortization
Net
Carrying
Amount
Weighted
Average
Remaining
Life
Business relationships$9,918  $(2,841) $7,077  8.6 years
Developed technology7,832  (4,959) 2,873  2.2 years
Content3,814  (3,814) —  0.0 years
Domain and data licenses2,869  (2,748) 121  1.7 years
Trademarks877  (872)  0.2 years
User relationships146  (140)  0.2 years
Total$25,456  $(15,374) $10,082  
 As of December 31, 2017
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net
Carrying
Amount
 
Weighted
Average
Remaining
Life
Business relationships$9,918
 $(896) $9,022
 10.3 years
Developed technology7,832
 (2,071) 5,761
 4.1 years
Content4,005
 (3,610) 395
 1.8 years
Domain and data licenses2,869
 (1,847) 1,022
 2.2 years
Trademarks877
 (287) 590
 2.2 years
User relationships146
 (43) 103
 2.2 years
Total$25,647
 $(8,754) $16,893
  


As of December 31, 2016As of December 31, 2018
Gross
Carrying
Amount
 Accumulated
Amortization
 Net
Carrying
Amount
 Weighted
Average
Remaining
Life
Gross
Carrying
Amount
Accumulated
Amortization
Net
Carrying
Amount
Weighted
Average
Remaining
Life
Business relationships$17,400
 $(2,741) $14,659
 10.1 yearsBusiness relationships$9,918  $(1,868) $8,050  9.4 years
User relationships12,000
 (3,240) 8,760
 5.1 years
Developed technology9,280
 (4,122) 5,158
 3.1 yearsDeveloped technology7,832  (3,562) 4,270  3.1 years
Content3,674
 (2,581) 1,093
 2.0 yearsContent3,873  (3,696) 177  0.8 years
Domain and data licensesDomain and data licenses2,869  (2,359) 510  1.5 years
Trademarks3,338
 (1,861) 1,477
 2.1 yearsTrademarks877  (579) 298  1.2 years
Domain and data licenses2,804
 (1,340) 1,464
 3.0 years
Advertiser relationships1,549
 (1,549) 
 0.0 years
User relationshipsUser relationships146  (92) 54  1.2 years
Total$50,045
 $(17,434) $32,611
 Total$25,515  $(12,156) $13,359  
Amortization expense for the years ended December 31, 2019, 2018 and 2017 2016 and 2015 was $6.6$3.3 million, $6.8$3.5 million and $6.5$6.6 million, respectively.
As of December 31, 2017,2019, the estimated future amortization of purchased intangible assets for (i) each of the succeeding five years and (ii) thereafter iswas as follows (in thousands):
Year Ending December 31,Amount
2020$2,402  
20212,262  
20221,045  
2023714  
2024708  
Thereafter2,951  
Total$10,082  

Year Ending December 31,Amount
2018$3,533
20193,277
20202,402
20212,262
20221,045
Thereafter4,374
Total amortization$16,893

8.9. ACQUISITIONS AND DISPOSALS
2017 Acquisitions and Disposals
Nowait, Inc.
On February 28, 2017, the Company acquired Nowait, Inc. (“Nowait”). In connection with the acquisition, all outstanding capital stock and options and warrants to purchase capital stock of Nowait — including the 20% equity investment in Nowait the Company acquired in July 2016 (see Note 9) — were converted into the right to receive an aggregate of approximately $39.8 million in cash. Of the total amount of consideration paid in connection with the acquisition, $7.9 million is being held in escrow for a two-year period after the closing to secure the Company’s indemnification rights. The key purpose underlying the acquisition was to secure waitlist system and seating tool technology. The Company utilized an income approach to determine the valuation of the Company’s existing equity investment in Nowait as of the acquisition date. The carrying value of the Company’s investment approximated its fair value.
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The acquisition was accounted for as a business combination in accordance with Accounting Standards Codification Topic 805, “Business Combinations” (“ASC 805”), with the results of Nowait’s operations included in the Company’s consolidated financial statements from February 28, 2017. The Company’s allocation of thefinal purchase price is preliminary as the amounts related to identifiable intangible assets and the effects of any net working capital adjustments are still being finalized. Any material measurement period adjustments will be recorded in the period the adjustment is identified. The purchase price allocation subject to finalization during the measurement period, is as follows (in thousands):
 February 28, 2017
Fair value of purchase consideration: 
Cash: 
Distributed to Nowait stockholders$31,892
Held in escrow account7,945
Total purchase consideration39,837
Fair value of net assets acquired: 
Cash and cash equivalents$1,004
Intangible assets12,670
Goodwill25,959
Other assets1,065
Total assets acquired40,698
Liabilities assumed(861)
Total liabilities assumed(861)
Net assets acquired$39,837
February 28, 2017
Fair value of purchase consideration:
Cash:
Distributed to Nowait stockholders$31,892 
Held in escrow account7,945 
Total purchase consideration$39,837 
Fair value of net assets acquired:
Cash and cash equivalents$1,004 
Intangible assets12,670 
Goodwill25,959 
Other assets1,065 
Total assets acquired40,698 
Liabilities assumed(861)
Total liabilities assumed(861)
Net assets acquired$39,837 
Estimated useful lives and the amount assigned to each class of intangible assets acquired are as follows (dollars in thousands):
Intangible Asset TypeAmount Assigned Useful Life
Enterprise restaurant relationships$8,500
 12.0 years
Acquired technology2,900
 5.0 years
Trademarks610
 3.0 years
Local restaurant relationships600
 5.0 years
User relationships60
 3.0 years
Weighted average  9.6 years
Intangible Asset Type:Amount AssignedUseful Life
Enterprise restaurant relationships$8,500 12.0 years
Acquired technology$2,900 5.0 years
Trademarks$610 3.0 years
Local restaurant relationships$600 5.0 years
User relationships$60 3.0 years
Weighted average9.6 years
The intangible assets are being amortized on a straight-line basis, which reflects the pattern in which the economic benefits of the intangible assets are being utilized. The goodwill results from the Company’s opportunity to drive daily engagement in its key restaurant vertical by allowing consumers to move more quickly from search and discovery to transacting at a local business. None of the goodwill is deductible for tax purposes.

The Company recorded 0 acquisition-related transaction costs for the years ended December 31, 2019 and 2018. For the year ended December 31, 2017, the Company recorded acquisition-related transaction costs of approximately $0.1 million, which were included in general and administrative expenses in the accompanying condensed consolidated statement of operations.
The Company's Consolidated Statementconsolidated statements of Operationsoperations for the yearyears ended December 31, 20172019 and 2018 included $3.9$7.8 million and $5.3 million of revenues attributable to Nowait.the Nowait product, respectively. The Company has completed itsthe integration of Nowait's operations into those of the Company during the three months ended December 31, 2017 and, as such, determining Nowait's contribution to the net income of the Company for the period after the acquisition dateyears ended December 31, 2019 and 2018 is impracticable.
Turnstyle Analytics Inc.
On April 3, 2017, the Company acquired all of the equity interests in Turnstyle Analytics Inc. (“Turnstyle”) for approximately $20.6 million, approximately $1.0 million of which represents compensation cost due to a continuous service requirement, and the remainder of which represents purchase consideration. Of the total consideration paid in connection with the acquisition, $3.1 million is beingwas initially held in escrow for an 18-month period after the closing to secure the Company’s indemnification rights. The remaining escrow funds were released in October 2018. The key factor underlying the acquisition was to obtain a customer
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retention and loyalty product in the form of a location-based marketing and analytics platform that provides wifi as a digital marketing tool to expand itsthe Company's product offerings for local businesses.
The acquisition was accounted for as a business combination in accordance with ASC 805, with the results of Turnstyle’s operations included in the Company’s consolidated financial statements from April 3, 2017. The Company’s allocation of thefinal purchase price is preliminary as the amounts related to identifiable intangible assets and the effects of any net working capital adjustments are still being finalized. Any material measurement period adjustments will be recorded in the period the adjustment is identified. The purchase price allocation subject to finalization during the measurement period, is as follows (in thousands):
 April 3, 2017
Fair value of purchase consideration 
Cash: 
Distributed to Turnstyle stockholders$16,648
Held in escrow account3,093
Total purchase consideration$19,741
Fair value of net assets acquired: 
Cash and cash equivalents$30
Intangible assets4,252
Goodwill16,048
Other assets250
Total assets acquired20,580
Deferred tax liability(450)
Liabilities assumed(389)
Total liabilities assumed(839)
Net assets acquired$19,741
April 3, 2017
Fair value of purchase consideration:
Cash:
Distributed to Turnstyle stockholders$16,648 
Held in escrow account3,093 
Total purchase consideration$19,741 
Fair value of net assets acquired:
Cash and cash equivalents$30 
Intangible assets4,252 
Goodwill16,048 
Other assets250 
Total assets acquired20,580 
Deferred tax liability(450)
Liabilities assumed(389)
Total liabilities assumed(839)
Net assets acquired$19,741 
Estimated useful lives and the amount assigned to each class of intangible assets acquired are as follows (dollars in thousands):
Intangible Asset TypeAmount Assigned Useful Life
Acquired technology$3,250
 5.0 years
Business relationships672
 5.0 years
Trademarks250
 3.0 years
User relationships80
 3.0 years
Weighted average  4.9 years
Intangible Asset Type:Amount AssignedUseful Life
Acquired technology$3,250 5.0 years
Business relationships$672 5.0 years
Trademarks$250 3.0 years
User relationships$80 3.0 years
Weighted average4.9 years
The intangible assets are being amortized on a straight-line basis, which reflects the pattern in which the economic benefits of the intangible assets are being utilized. The goodwill results from the Company’s opportunity to expand its product offerings to local businesses through the Turnstyle marketing and analytics platform.platform, which the Company renamed Yelp WiFi Marketing. None of the goodwill is deductible for tax purposes.

The Company recorded 0 acquisition-related transaction costs for the years ended December 31, 2019 and 2018. For the year ended December 31, 2017, the Company recorded acquisition-related transaction costs of approximately $0.3 million, which were included in general and administrative expenses in the accompanying consolidated statement of operations.
The consolidated statements of operations for the years ended December 31, 2019 and 2018 include $2.1 million and $3.1 million of revenue attributable to Yelp WiFi Marketing, respectively.
The Company completed the integration of Turnstyle's operations into those of the Company during the three months ended December 31, 2017 and, as such, determining Turnstyle's contribution to the net income of the Company for the years ended December 31, 2019 and 2018 is impracticable. The consolidated statement of operations for the year ended December 31, 2017 include  $1.3 million of revenue attributable to Turnstyle andincludes $8.8 million of net loss attributable to Turnstyle.
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Table of Contents
Eat24, LLC
On October 10, 2017, pursuant to the terms of a Unit Purchase Agreement, dated as of August 3, 2017 (the “Purchase Agreement”), by and among the Company, Eat24, LLC, a wholly owned subsidiary of the Company, Grubhub Inc. (“Grubhub”) and Grubhub Holdings Inc. (“Purchaser”), a wholly owned subsidiary of Grubhub, the Company completed the sale of all of the outstanding equity interests in Eat24 to the Purchaser (the “Disposal”). Immediately prior to the closing of the Disposal, the Company transferred certain assets to Eat24, which consisted of assets that were material to or necessary for the operation of the Eat24 business that were not then owned by Eat24. The Company entered into a Marketing Partnership Agreement (“Partnership Agreement”) with the Purchaser concurrently with the Purchase Agreement. The purpose of the Disposal was to further capitalize on the Company's strong market position of connecting people with local businesses by selling Eat24 to the Purchaser, which has a strong presence in online and mobile food ordering, and entering into the Partnership Agreement, pursuant to which the Company earns a fee on all food orders placed through the Grubhub restaurant network, including Eat24 restaurants, that originate on the Company's Platform.platform.
The Company received approximately $251.7 million in cash at closing; the Purchaser paid the remaining $28.8 million of the purchase price into an escrow account, which will bewas held for an initial 18-month period after closing to secure the Purchaser's rights of indemnification under the Purchase Agreement and iswas presented on the Company's Consolidated Balance Sheetsconsolidated balance sheets as an Other non-current asset as of December 31, 2018 (see Note 9)11,"Other Non-Current Assets"). Following the expiration of the escrow period in April 2019, the full amount in escrow was released to the Company. The Company received approximately $1.0 million in additional purchase consideration on December 14, 2017 as a net working capital adjustment. As a result of the sale, the Company recognized a pre-tax gain of $163.7 million during the three monthsyear ended December 31, 2017, a pre-tax gain of $164.8 million which is included in gain on disposal of a business unit in the Company's consolidated statement of operations and is net of $0.3 million in disposal relatedDisposal-related costs. Prior to the Disposal, Eat24 was its own reporting unit and $110.8 million of goodwill associated with the Eat24 reporting unit was derecognizedde-recognized and included with the net assets disposed (see Note 7).transferred in the Disposal.
The Disposal was accounted for as an asset group disposal in accordance with Accounting Standards Codification 360, "Property, Plant, and Equipment." The results of Eat24's operations are included in the Company's consolidated financial statements through October 9,10, 2017. As the Disposal represented the sale of an individually significant component, the Company has disclosed the loss before provision for income taxes attributable to Eat24 was $11.9 million for the year ended December 31, 2017, 2016 and 2015 are2017. The Company acquired Eat24 on February 9, 2015. The final disbursement from the escrow account created to secure indemnification obligations related to the Company's acquisition of Eat24 was completed in the three months ended March 31, 2018.

10. LEASES
The components of lease cost as of December 31, 2019 were as follows (in thousands):
 Year Ended
December 31,
 2017 2016 2015
Loss before income taxes$(11,941) $(4,873) $(4,760)
Pro Forma Financial Information
Year Ended
December 31, 2019
Operating lease cost$54,451 
Short-term lease cost (12 months or less)1,287 
Sublease income(4,759)
Total lease cost, net$50,979 
The unaudited pro forma financial information in the tables below summarizes: (a) the combined results of operations forCompany's leases and subleases do not include any variable lease payments, residual value guarantees, related-party leases, or restrictions or covenants that would limit or prevent the Company and Nowait; (b) the combined results of operations for the Company and Turnstyle; (c) the results of operations of the Company adjusted for the Disposal of Eat24; and (d) the combined results of operations for the Company, Nowait and Turnstyle adjusted for the Disposal of Eat24, in each case as though the respective transactions had occurred as of January 1, 2016. The unaudited pro forma financial information includes the accounting effects resulting from the transactions, including amortization charges from acquired intangible assets and changes in depreciation dueexercising its right to differing asset values and depreciation lives.
The unaudited pro forma financial information, as presented below, is for informational purposes only and is not necessarily indicative of the results of operations that would have been achieved if the transactions had taken place as of January 1, 2016 (in thousands, except per share data):
Nowait, Inc.

 Year Ended
 December 31,
 2017 2016
Net revenue$847,587
 $717,140
Net income (loss)151,817
 (12,141)
Basic net income (loss) per share attributable to common stockholders1.86
 (0.16)
Diluted net income (loss) per share attributable to common stockholders1.74
 (0.16)
Turnstyle Analytics Inc.
 Year Ended
 December 31,
 2017 2016
Net revenue$847,172
 $714,132
Net income (loss)152,713
 (6,741)
Basic net income (loss) per share attributable to common stockholders1.87
 (0.09)
Diluted net income (loss) per share attributable to common stockholders1.75
 (0.09)
Eat24, LLC
 Year Ended
 December 31,
 2017 2016
Net revenue$792,904
 $654,996
Net income164,799
 203
Basic net income per share attributable to common stockholders2.02
 
Diluted net income per share attributable to common stockholders1.89
 
Combined
 Year Ended
 December 31,
 2017 2016
Net revenue$794,037
 $660,130
Net income (loss)163,611
 (9,340)
Basic net income (loss) per share attributable to common stockholders2.00
 (0.12)
Diluted net income (loss) per share attributable to common stockholders1.88
 (0.12)
2015 Acquisition
On February 9, 2015, the Company acquired Eat24Hours.com, Inc. In connection with the acquisition,obtain substantially all of the outstanding capital stock of Eat24 was converted into the right to receive an aggregate of approximately $75.0 million in cash, less certain transaction expenses, and 1,402,844 shares of Yelp Class A common stock with an aggregate fair value of approximately $59.2 million, as determined on the basiseconomic benefits from use of the closing market price ofrespective assets during the Company’s Class A common stock onlease term.

The Company will continue to disclose comparative reporting periods prior to January 1, 2019 under ASC 840.

During the acquisition date. Of the total consideration paid in connection with the acquisition, $16.5 million in cash and 308,626 shares were initially held in escrow to secure indemnification obligations. The balance remaining in the escrow fund was $1.9 million in cash as ofyears ended December 31, 2017. The key purpose underlying2018 and 2017, the acquisitionCompany recognized rent expense, net of sublease rental income, on a straight-line basis over the lease period. Rent expense, net was to obtain an online food ordering solution to drive daily engagement in$51.2 million and $42.5 million for the Company’s key restaurant vertical.years ended December 31, 2018 and December 31, 2017, respectively.


The acquisition was accounted forCompany subleased certain office facilities under operating lease agreements that expire in 2025. The sublease agreements do not contain any options to renew. The Company recognizes sublease rental income as a business combinationreduction in accordance with ASC 805, withrent expense on a straight-line basis over the resultslease period. Sublease rental income was $2.2 million and $2.6 million for the years ended December 31, 2018 and 2017, respectively.

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Table of Eat24’s operations included inContents
Supplemental cash flow information related to leases for the Company’s consolidated financial statements from February 9, 2015. The initial purchase price allocationyear ended December 31, 2019 was as follows (in thousands):

 February 9, 2015
Fair value of purchase consideration: 
Cash: 
Distributed to Eat24 stockholders$56,624
Held in escrow account16,500
Payable on behalf of Eat24 stockholders1,876
Total cash75,000
Class A common stock: 
Distributed to Eat24 stockholders46,143
Held in escrow account13,015
Total purchase consideration$134,158
Fair value of net assets acquired: 
Cash and cash equivalents$1,578
Intangibles39,600
Goodwill110,927
Other assets6,031
Total assets acquired158,136
Deferred tax liability(15,207)
Other liabilities(8,771)
Total liabilities assumed(23,978)
Net assets acquired$134,158
Estimated useful lives and the amount assigned to each class of intangible assets acquired are as follows:
Intangible Asset TypeAmount Assigned Useful Life
Restaurant relationships$17,400
 12.0 years
Developed technology$7,400
 5.0 years
User relationships$12,000
 7.0 years
Trade name$2,800
 4.0 years
Weighted average  8.6 years
Prior to the Disposal, the intangible assets were being amortized on a straight-line basis, which reflected the pattern in which the economic benefits of the intangible assets were being utilized. The goodwill resulted from the Company’s opportunity to drive daily engagement in its restaurant vertical and the potential to expand Eat24’s offering to the U.S. restaurants listed on the Company’s platform. None of the goodwill is deductible for tax purposes.
The Company recorded no acquisition-related costs for the years ended December 31, 2017 and 2016, and $0.2 million in acquisition-related costs in the year ended December 31, 2015, which were included in the general and administrative expense in the accompanying consolidated statements of operations.
The consolidated statements of operations for the year ended December 31, 2015 include $39.2 million of revenue attributable to Eat24.
9.OTHER NON-CURRENT ASSETSDecember 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases$56,672 
As of December 31, 2019, maturities of lease liabilities for (i) each of the succeeding five years and (ii) thereafter were as follows (in thousands):
Year Ending December 31,Operating
Leases
2020$59,522  
202152,060  
202244,712  
202341,652  
202439,420  
Thereafter37,112  
Total minimum lease payments274,478  
Less imputed interest(42,215) 
Present value of lease liabilities$232,263  
As of December 31, 2018, maturities of lease liabilities for (i) each of the succeeding five years and (ii) thereafter were as follows (in thousands):
Year Ending December 31,Operating
Leases
2019$56,703  
202059,009  
202151,429  
202243,603  
202340,517  
Thereafter69,980  
Total minimum lease payments$321,241  
As of December 31, 2019, the weighted-average remaining lease term and weighted-average discount rate were as follows:
December 31, 2019
Weighted-average remaining lease term (years) — operating leases5.5
Weighted-average discount rate — operating leases6.1 %
In October 2019, the Company entered into a lease agreement for an office facility in London, U.K. for which the lease term has not yet commenced. The lease expires in 2030 and the Company expects to classify it as an operating lease. The Company expects to record $15.0 million of operating lease cost over the life of the lease.



Table of Contents
11. OTHER NON-CURRENT ASSETS
Other non-current assets as of December 31, 20172019 and 20162018 consisted of the following (in thousands):

20192018
Deferred tax assets$20,054  $17,240  
Deferred contract costs15,138  12,345  
Escrow deposit—  28,750  
Other non-current assets3,177  1,109  
Total other non-current assets$38,369  $59,444  
 December 31,
2017
 December 31,
2016
Escrow deposit$28,750
 $
Cost-method investments
 8,000
Other2,589
 2,992
Total other non-current assets$31,339
 $10,992
The escrow deposit isconsisted of the funds held in escrow related to the disposalDisposal of Eat24 (see Note 8)9,"Acquisitions and Disposals"), which will bewere held for an 18-month period after closing to secure the Purchaser's rights of indemnification under the Purchase Agreement. Cost-method investments representFollowing the Company’s investmentexpiration of the escrow period in April 2019, the deposit was released to the Company.
Deferred contract costs as of December 31, 2019 and 2018, and changes in deferred contract costs during the years ended December 31, 2019 and 2018, were as follows (in thousands):
20192018
Balance, beginning of period$12,345  $9,089  
Add: costs deferred on new contracts14,998  14,572  
Less: amortization recorded in sales and marketing expenses(12,205) (11,316) 
Balance, end of period$15,138  $12,345  

12. CONTRACT BALANCES
The allowance for doubtful accounts as of December 31, 2019, 2018 and 2017, and changes in the preferred stockallowance for doubtful accounts during the years ended December 31, 2019, 2018 and 2017, were as follows (in thousands):
Year Ended December 31,
201920182017
Balance, beginning of period$8,685  $8,602  $6,196  
Add: provision for doubtful accounts22,543  24,515  20,917  
Less: write-offs, net of recoveries(23,542) (24,432) (18,511) 
Balance, end of period$7,686  $8,685  $8,602  
Contract liabilities consist of Nowait,deferred revenue, which is recorded on the consolidated balance sheets when the Company has received consideration, or has the right to receive consideration, in advance of transferring the performance obligations under the contract to the customer.
As of December 31, 2019, deferred revenue was completed on July 15, 2016. The Company acquired$4.3 million, the entiretymajority of Nowait on February 28, 2017 and its original investment of $8 million was returnedwhich is expected to itbe recognized as revenue in the three months endedsubsequent three-month period ending March 31, 20172020. Changes in connectiondeferred revenue during the years ended December 31, 2019 and 2018 were as follows (in thousands):
Year Ended December 31,
20192018
Balance, beginning of period$3,843  $3,469  
Less: recognition of deferred revenue from beginning balance(3,744) (3,436) 
Add: net increase in current period contract liabilities4,216  3,810  
Balance, end of period$4,315  $3,843  
The net increase in contract liabilities primarily relates to new contracts with customers during the acquisition. The remainingperiods presented. No other non-currentcontract assets or liabilities are primarily deferred tax assets.recorded on the Company's consolidated balance sheets as of December 31, 2019 and 2018.
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10.ACCRUED LIABILITIES
Accrued13. ACCOUNTS PAYABLE AND ACCRUED LIABILITIES
Accounts payable and accrued liabilities as of December 31, 20172019 and 20162018 consisted of the following (in thousands):
December 31,
2019
December 31,
2018
Accounts payable$6,002  $6,540  
Employee related liabilities41,488  23,634  
Accrued sales and marketing expenses2,982  4,536  
Taxes payable3,695  3,438  
Accrued cost of revenue7,208  5,463  
Other accrued liabilities10,958  17,451  
Total accrued liabilities$72,333  $61,062  

14. LONG-TERM LIABILITIES
 December 31,
2017
 December 31,
2016
Accrued tax liabilities$32,617
 $5,456
Accrued compensation17,725
 12,892
Accrued marketing3,458
 4,633
Other accrued expenses19,865
 13,749
Total accrued liabilities$73,665
 $36,730
11.LONG-TERM LIABILITIES
Long-term liabilities as of December 31, 20172019 and 20162018 consisted of the following (in thousands):
December 31,
2019
December 31,
2018
Deferred rent$—  $31,253  
Other long-term liabilities6,798  3,887  
Total long-term liabilities$6,798  $35,140  
The Company de-recognized the deferred rent balance as of December 31, 2018 upon its adoption of ASC 842 on January 1, 2019. See Note 2,"Summary of Significant Accounting Policies."

 December 31,
2017
 December 31,
2016
Deferred rent$26,904
 $16,896
Other long-term liabilities3,833
 725
Total long-term liabilities$30,737
 $17,621
12.15. COMMITMENTS AND CONTINGENCIES
Office Facility Leases—The Company leases its office facilities under operating lease agreements that expire from 2018 to 2029. Certain lease agreements provide for rental payments on a graduated basis. The Company recognizes rent expense on a straight-line basis over the lease period. Rental expense was $42.5 million, $36.8 million and $30.9 million for the years ended December 31, 2017, 2016 and 2015, respectively.
As of December 31, 2017, the Company’s minimum payments under noncancelable operating leases for equipment and office space having initial terms in excess of one year were as follows (in thousands):
Year Ending December 31,
Operating
Leases
2018$49,481
201951,352
202053,922
202146,289
202238,251
Thereafter93,541
Total minimum lease payments$332,836
The Company has subleased certain office facilities under operating lease agreements that expire in 2021. The Company recognizes sublease rentals as a reduction in rental expense on a straight-line basis over the lease period. Sublease rental income was $2.6 million, $2.0 million, and $1.4 million for the years ended December 31, 2017, 2016, and 2015, respectively. The Company expects future sublease rental receipts of $6.5 million between 2018 and 2021.
Legal ProceedingsThe Company is subject to legal proceedings arising in the ordinary course of business. Although the results of litigation and claims cannot be predicted with certainty, the Company currently does not believe that the final outcome of any of these matters will have a material adverse effect on the Company’s business, financial position, results of operations or cash flows.
In August 2014, two putative class action lawsuits alleging violations of federal securities laws were filed in the U.S. District Court for the Northern District of California, naming as defendants the Company and certain of its officers. The lawsuits allege

violations of the Exchange Act by the Company and certain of its officers for allegedly making materially false and misleading statements regarding the Company’s business and operations between October 29, 2013 and April 3, 2014. These cases were subsequently consolidated and, in January 2015, the plaintiffs filed a consolidated complaint seeking unspecified monetary damages and other relief. Following the court’s dismissal of the consolidated complaint on April 21, 2015, the plaintiffs filed a first amended complaint on May 21, 2015. On November 24, 2015, the court dismissed the first amended complaint with prejudice, and entered judgment in the Company’s favor on December 28, 2015. The plaintiffs appealed this decision to the U.S. Court of Appeals for the Ninth Circuit, which affirmed the district court's decision on November 21, 2017.
On January 18, 2018, a putative class action lawsuit alleging violations of the federal securities laws was filed in the U.S. District Court for the Northern District of California, naming as defendants the Company and certain of its officers. The lawsuitcomplaint, which the plaintiff amended on June 25, 2018, alleges violations of the Securities Exchange Act of 1934, as amended, by the Company and its officers for allegedly making materially false and misleading statements regarding its business and operations on February 9, 2017. The plaintiff seeks unspecified monetary damages and other relief. On August 2, 2018, the Company and the other defendants filed a motion to dismiss the amended complaint, which the court granted in part and denied in part on November 27, 2018. On October 22, 2019, the Court approved a stipulation to certify a class in this action. The case remains pending. Due to the preliminary nature of this lawsuit, the Company is unable to reasonably estimate either the probability of incurring a loss or an estimated range of such loss, if any, from the lawsuit.
The Company is subject to other legal proceedings arising in the ordinary course of business. Although the results of litigation and claims cannot be predicted with certainty, the Company currently does not believe that the final outcome of any of these other matters will have a material adverse effect on the Company’s business, financial position, results of operations or cash flows.
Indemnification Agreements—In the ordinary course of business, the Company may provide indemnifications of varying scope and terms to customers, vendors, lessors, business partners and other parties with respect to certain matters, including, but not limited to, losses arising out of the breach of such agreements, services to be provided by the Company or from intellectual property infringement claims made by third parties.
Under the Purchase Agreement, the Company agreed to indemnify the Purchaser and certain related parties against certain losses arising out of Purchaser's acquisition of Eat24, including, but not limited to, any breach or inaccuracy of any representation or warranty made by the Company or Eat24 in the Purchase Agreement. The Company's indemnification obligations are subject to the terms and conditions set forth in the Purchase Agreement, and are capped at the purchase price received by the Company in the Disposition.
In addition, the Company has entered into indemnification agreements with directors and certain officers and employees that will require the Company to, among other things, indemnify them against certain liabilities that may arise by reason of their status or service as directors, officers or employees.
While the outcome of claims cannot be predicted with certainty, the Company does not believe that the outcome of any claims under the indemnification arrangements will have a material effect on the Company’s financial position, results of operations or cash flows.
Payroll Tax Audit—In June 2015,
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16. STOCKHOLDERS’ EQUITY
The following table presents the IRS began a payroll tax auditnumber of shares authorized and issued and outstanding as of the Company for 2014. The Company recorded a liability in relation to this matter of $0.5 million as of December 31, 2016. In December 2017, the Company paid $0.7 million, and resolved the matter with the IRS.dates indicated:
13. STOCKHOLDERS’ EQUITY

December 31, 2019December 31, 2018
Shares
Authorized
Shares
Issued and
Outstanding
Shares
Authorized
Shares
Issued and
Outstanding
Stockholders’ equity:
Common stock, $0.000001 par value200,000,000  71,185,468  200,000,000  81,996,839  
Undesignated preferred stock10,000,000  —  10,000,000  —  
Stock Repurchase Program

On July 31, 2017, the Company’s board of directors authorizedapproved a stock repurchase program under which the Company maywas authorized to repurchase up to $200.0 million of its outstanding common stock. The Company's board of directors authorized the Company to repurchase an additional $250.0 million of its outstanding common stock on each of November 27, 2018 and February 11, 2019, bringing the total amount of authorized repurchases to $700.0 million by December 31, 2019. The Company may purchase shares at management’s discretion in the open market, in privately negotiated transactions, in transactions structured through investment banking institutions, or a combination of the foregoing.
During the yearyears ended December 31, 2017,2019 and 2018, the Company repurchased on the open market 302,206and subsequently retired 14,190,409 and 4,896,003 shares, respectively, for an aggregate purchase priceprices of approximately $12.6 million. The Company subsequently retired 301,106 of these shares$481.0 million and 1,100 shares remained as treasury stock as of December 31, 2017, which are carried at cost. The Company has since retired the shares held as treasury stock as of December 31, 2017.
Elimination of Dual-Class Common Stock Structure
On September 22, 2016, all outstanding shares of the Company’s Class A common stock and Class B common stock automatically converted into a single class of common stock (the “Conversion”) pursuant to the terms of the Company’s Amended and Restated Certificate of Incorporation. On September 23, 2016, the Company filed a certificate with the Secretary of State of the State of Delaware effecting the retirement and cancellation of the Class A common stock and Class B common stock. This certificate of retirement had the additional effect of eliminating the authorized Class A and Class B shares, thereby reducing the Company’s total number of authorized shares of common stock from 500,000,000 to 200,000,000.
The following table presents the number of shares authorized and issued and outstanding as of the dates indicated:
 December 31, 2017 December 31, 2016
 
Shares
Authorized
 
Shares
Issued and
Outstanding
 
Shares
Authorized
 
Shares
Issued and
Outstanding
Stockholders’ equity:       
Common stock, $0.000001 par value200,000,000
 83,724,916
 200,000,000
 79,429,833
Undesignated Preferred Stock10,000,000
 
 10,000,000
 
$187.4 million, respectively.
Common Stock Reserved for Future Issuance
As of December 31, 2017,2019, the Company had reserved shares of common stock for future issuances in connection with the following:
Number of Shares
OptionsStock options outstanding7,078,9326,210,685 
Restricted stock units and awardsRSUs outstanding7,249,2057,625,584 
Available for future stock option and restricted stock units and awardsequity award grants4,845,7727,233,289 
Available for future ESPP offerings2,518,9291,542,130 
Total reserved for future issuance21,692,83822,611,688 
Equity Incentive Plans
The Company has outstanding awards under three3 equity incentive plans: the Amended and Restated 2005 Equity Incentive Plan (the “2005 Plan”); the 2011 Equity Incentive Plan (the “2011 Plan”); and the 2012 Equity Incentive Plan, as amended (the “2012 Plan”). In July 2011, the Company adopted the 2011 Plan, terminated the 2005 Plan and provided that no further stock awards were to be granted under the 2005 Plan. All outstanding stock awards under the 2005 Plan continue to be governed by their existing terms. Upon the effectiveness of the underwriting agreement in connection with the Company’s initial public offering (“IPO”), the Company terminated the 2011 Plan and all shares that were reserved under the 2011 Plan but not issued were assumed by the 2012 Plan. No further awards will be granted pursuant to the 2011 Plan. All outstanding stock awards under the 2011 Plan continue to be governed by their existing terms. Under the 2012 Plan, the Company has the ability to issue incentive stock options, non-statutory stock options, stock appreciation rights, restricted stock units (“RSUs”),RSUs, restricted stock awards, (“RSAs”), performance units and performance shares. Additionally, the 2012 Plan provides for the grant of performance cash awards to employees, directors and consultants.
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Stock Options
Stock options granted under the 2012 Plan are granted at a price per share not less than the fair value of a share of the Company’s common stock at date of grant.on the grant date. Options granted to date generally vest over a 4.0-yearthree- or four-year period, on one of four4 schedules: (a) 25% vesting at the end of one year and the remaining shares vesting monthly thereafter; (b) 10% vesting over the first year, 20% vesting over the second year, 30% vesting over the third year and 40% vesting over the fourth year; (c) ratably on a monthly basis; or (d) 35% vesting over the first year, 40% vesting over the second year and 25% vesting over the third year. Options granted are generally exercisable for contractual terms of up to 10 years. The Company issues new shares when stock options are exercised.
For the years ended December 31, 2019, 2018 and 2017, the weighted-average assumptions used for the Black-Scholes-Merton option valuation model were as follows:
Year Ended December 31,
201920182017
Dividend yield—  —  —  
Annual risk-free rate2.5 %2.2 %2.1 %
Expected volatility48.3 %42.0 %44.0 %
Expected term (years)6.06.05.9
A summary of stock option activity for the year ended December 31, 20172019 is as follows:

Options Outstanding  
Number of
Shares
Weighted-
Average
Exercise
Price
Weighted-
Average
Remaining
Contractual
Term (in
years)
Aggregate
Intrinsic
Value (in
thousands)
Number of
Shares
 
Weighted-
Average
Exercise
Price
 
Weighted-
Average
Remaining
Contractual
Term (in
years)
 
Aggregate
Intrinsic
Value (in
thousands)
Outstanding-December 31, 20168,018,941
 $21.71
 6.10 years $147,673
Outstanding at December 31, 2018Outstanding at December 31, 20186,818,682  $24.54  5.1$88,983  
Granted920,850
 34.60
  Granted662,150  36.06  
Exercised(1,519,771) 19.74
  Exercised(826,124) 21.18  
Canceled(341,088) 44.78
  Canceled(444,323) 40.57  
Outstanding-December 31, 20177,078,932
 $22.70
 5.56 years $145,613
Options vested and exercisable as of December 31, 20175,774,043
 $20.55
 4.87 years $131,625
Outstanding at December 31, 2019Outstanding at December 31, 20196,210,385  $25.10  4.3$75,805  
Options vested and exercisable at December 31, 2019Options vested and exercisable at December 31, 20195,310,712  $22.94  3.7$75,540  
Aggregate intrinsic value represents the difference between the closing price of the Company’s common stock as quoted on the New York Stock Exchange on a given date and the exercise price of outstanding, in-the-money options. The total intrinsic value of options exercised was approximately $28.0$12.0 million, $23.2$18.9 million and $26.2$28.0 million for the years ended December 31, 2017, 20162019, 2018 and 2015,2017, respectively.
The weighted-average grant date fair value of options granted was $15.35, $10.16$17.64, $18.89 and $22.48$15.35 per share for the years ended December 31, 2017, 20162019, 2018 and 2015,2017, respectively.
As of December 31, 2017,2019, total unrecognized compensation costs related to unvested stock options was approximately $17.3$15.0 million, which is expectedthe Company expects to be recognizedrecognize over a weighted-average time period of 2.382.3 years.
RSUs
The cost of RSUs is determined using the fair value of the Company’s common stock on the date of grant. RSUs generally vest over a four-yearfour-year period, on one of three3 schedules: (a) 25% vesting at the end of one year and the remaining vesting quarterly or annually thereafter; (b) 10% vesting over the first year, 20% vesting over the second year, 30% vesting over the third year and 40% vesting over the fourth year; or (c) ratably on a quarterly basis.
RSUs also include PRSUs, for which the expense is recognized from the date of grant. The PRSUs are subject to both a performance goal and a time-based vesting schedule. The shares underlying each PRSU award will be eligible to vest only if the average closing price of the Company's common stock equals or exceeds $45.3125 over any 60-day trading period during the four years following the grant date of February 7, 2019 (the "Performance Goal"). If the Performance Goal is met, the shares underlying each PRSU award will vest quarterly over four years from the grant date (the "Time-Based Vesting Schedule"). Any shares subject to the PRSUs that have met the Time-Based Vesting Schedule at the time the Performance Goal
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is achieved will fully vest as of such date; thereafter, any remaining unvested shares subject to the PRSUs will continue vesting solely according to the Time-Based Vesting Schedule.
As the PRSU activity during the year ended December 31, 2019 was not material, it is presented together with the RSU activity in the table below.

A summary of RSU activity for the year ended December 31, 20172019 is as follows:
Number of
Shares
Weighted-
Average Grant
Date Fair Value
Nonvested at December 31, 20186,563,863  $38.67  
Granted6,205,023  34.35  
Vested (1)
(3,273,159) 36.01  
Canceled(1,870,143) 37.82  
Nonvested at December 31, 20197,625,584  $36.51  
 Restricted Stock Units
 
Number of
Shares
 
Weighted-
Average Grant
Date Fair Value
Unvested December 31, 20167,090,465
 $32.43
Granted4,647,404
 37.22
Released (1)
(2,761,821) 34.06
Canceled(1,726,843) 33.75
Unvested December 31, 20177,249,205
 $34.57
(1) Included in this balance is 58,9831,254,365 shares vested but not issued due to net share settlement for payment of employee taxestaxes.
The aggregate fair value as of the vest date of RSUs that vested during the years ended December 31, 2019, 2018 and 2017 was $112.4 million, $131.1 million and $104.2 million, respectively. As of December 31, 2017,2019, the Company had approximately $233.1$266.2 million of unrecognized stock-based compensation expense related to RSUs, which is expectedthe Company expects to be recognizedrecognize over the remaining weighted-average vesting period of approximately 2.692.8 years.
Employee Stock Purchase Plan
The ESPP allows eligible employees to purchase shares of the Company’s common stock at a discount through payroll deductions of up to 15% of their eligible compensation, subject to any plan limitations, during designated offering periods. At the end of each offering period, employees are able to purchase shares at 85% of the fair market value of the Company’s common stock on the last day of the offering period, based on the closing sales price of the Company's common stock as quoted on the New York Stock Exchange on such date.
During the years ended December 31, 2017, 2016,2019, 2018 and 2015,2017, employees purchased 534,120, 442,679 and 373,580 342,057, and 312,697 shares, respectively, at a weighted-average purchase price per share of $27.66, $32.07 and $29.23, $26.12, and $25.80, respectively, and therespectively. The Company recognized stock-

basedstock-based compensation expense related to the ESPP of $2.6 million, $2.6 million and $2.0 million $1.5 million, and $4.3 million, respectively, in the year ended December 31, 2017.
Stock-Based Compensation
The fair value of options granted to employees is estimated on the grant date using the Black-Scholes-Merton option valuation model. This valuation model for stock-based compensation expense requires the Company to make assumptions and judgments about the variables used in the calculation, including the expected term (weighted-average period of time that the options granted are expected to be outstanding), the volatility in the fair market value of the Company’s common stock, a risk-free interest rate, and expected dividends. No compensation cost is recorded for options that do not vest. The Company uses the simplified calculation of expected life and volatility is based on an average of the historical volatilities of the common stock of several entities with characteristics similar to those of the Company. The risk-free rate is based on the U.S. Treasury yield curve in effect at the time of grant for periods corresponding with the expected life of the option.
The Company uses the straight-line method for expense attribution. For the years ended December 31, 2019, 2018 and 2017, 2016 and 2015, the weighted-average assumptions are as follows:respectively.
 Year Ended December 31,
 2017 2016 2015
Dividend yield
 
 
Annual risk-free rate2.14% 1.53% 1.78%
Expected volatility44.00% 44.00% 49.27%
Expected term (years)5.90
 5.84
 6.11
Stock-Based Compensation
The following table summarizes the effects of stock-based compensation expense related to stock-based awards in the consolidated statements of operations during the periods presented (in thousands):
Year Ended December 31,Year Ended December 31,
2017 2016 2015201920182017
Cost of revenue$4,010
 $2,446
 $1,117
Cost of revenue$4,535  $4,572  $4,010  
Sales and marketing28,100
 27,098
 21,962
Sales and marketing30,668  30,779  28,100  
Product development47,280
 36,323
 23,431
Product development63,433  56,882  47,280  
General and administrative21,025
 20,394
 14,332
General and administrative22,876  22,153  21,025  
Total stock-based compensation in income (loss) before incomes taxes100,415
 86,261
 60,842
Total stock-based compensation recorded to income before incomes taxesTotal stock-based compensation recorded to income before incomes taxes121,512  114,386  100,415  
Benefit from income taxes(1,407) (643) (402)Benefit from income taxes(31,565) (30,237) (1,407) 
Total stock-based compensation in income (loss)$99,008
 $85,618
 $60,440
Total stock-based compensation recorded to net incomeTotal stock-based compensation recorded to net income$89,947  $84,149  $99,008  
During the years ended December 31, 2017, 20162019, 2018 and 2015,2017, the Company capitalized $5.8$9.8 million, $4.5$7.8 million and $3.0$5.8 million, respectively, of stock-based compensation expense as website and internal-use software costs.

14.
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17. OTHER INCOME, NET
Other income, net for the years ended December 31, 2017, 20162019, 2018 and 20152017 consisted of the following (in thousands):
Year Ended December 31,
201920182017
Interest income, net$13,328  $13,804  $4,189  
Transaction gain (loss) on foreign exchange27  (70) 258  
Other non-operating income, net901  375  417  
Other income, net$14,256  $14,109  $4,864  

 Year Ended December 31,
 2017 2016 2015
Interest income, net$4,189
 $1,724
 $622
Transaction gain (loss) on foreign exchange258
 (175) (687)
Other non-operating income, net417
 145
 451
Other income, net$4,864
 $1,694
 $386
15.18. INCOME TAXES
The following table presents domestic and foreign components of income (loss) before income taxes for the periods presented (in thousands):
Year Ended December 31,Year Ended December 31,
2017 2016 2015201920182017
United States$194,239
 $1,679
 $(18,604)United States$55,292  $44,856  $194,376  
Foreign(9,890) (4,964) (2,334)Foreign(5,525) (4,850) (9,890) 
Total$184,349
 $(3,285) $(20,938)
Total income before income taxesTotal income before income taxes$49,767  $40,006  $184,486  
The income tax provision is composed of the following (in thousands):

Year Ended December 31,
201920182017
Current:
Federal$8,598  $(819) $25,785  
State2,570  384  5,069  
Foreign517  560  354  
Total current tax$11,685  $125  $31,208  
Deferred:
Federal$(2,916) $(10,032) $(28) 
State59  (6,491) 15  
Foreign58  1,054  296  
Total deferred tax(2,799) (15,469) 283  
Total provision for (benefit from) income taxes$8,886  $(15,344) $31,491  
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 Year Ended December 31,
 2017 2016 2015
Current:     
Federal$25,785
 $
 $(10)
State5,069
 35
 370
Foreign354
 86
 1,010
 $31,208
 $121
 $1,370
Deferred:     
Federal$(28) $106
 $3,505
State15
 13
 6,245
Foreign296
 1,145
 842
 283
 1,264
 10,592
Total provision for income taxes$31,491
 $1,385
 $11,962
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The following table presents a reconciliation of the statutory federal rate and the Company’s effective tax rate for the periods presented:
Year Ended December 31,
201920182017
Income tax at federal statutory rate21.00 %21.00 %35.00 %
State tax, net of federal tax effect2.83  3.24  3.54  
Foreign income tax rate differential(0.56) (0.54) 0.50  
Stock-based compensation3.46  (16.80) (4.82) 
Income tax credits(26.94) (35.83) (5.39) 
Change in valuation allowance10.40  (25.08) (30.23) 
Change in uncertain tax positions0.56  4.48  0.98  
Gain on disposal of a business unit—  —  17.42  
Employee fringe benefits5.97  7.28  0.24  
Other non-deductible expenses1.42  2.73  0.12  
Deferred adjustments0.37  2.24  (0.12) 
Other(0.65) (1.07) (0.18) 
Effective tax rate17.86 %(38.35)%17.06 %
 Year Ended December 31,
 2017 2016 2015
Income tax at federal statutory rate35.00 % 35.00 % 35.00 %
State tax, net of federal tax effect3.57
 21.29
 4.59
Foreign income tax rate differential0.50
 (1.54) (10.03)
Stock-based compensation(4.83) 10.50
 (3.60)
Income tax credits(5.39) 163.87
 14.30
Change in valuation allowance(30.24) (189.19) (96.18)
Goodwill associated with Disposition17.43
 
 
Meals and entertainment0.24
 (13.84) (2.63)
Other non-deductible expenses0.12
 (6.16) (1.58)
Benefit for tax only asset
 
 4.99
Prior year deferred tax true-up(0.12) (11.81) (0.57)
Expiration of deferred tax benefit
 (50.76) 
Other0.80
 0.47
 (1.38)
Effective tax rate17.08 % (42.17)% (57.09)%
On December 22, 2017, the U.S.Deferred Tax Cuts and Jobs Act (the “Tax Act”) was signed into law. The Tax Act makes broad and complex changes to the U.S. tax code that impact the Company's provision for income taxes, including, but not limited to, reducing the U.S. federal corporate tax rate and requiring a one-time Deemed Repatriation Tax (the "Transition Tax”) on certain un-repatriated earnings of foreign subsidiaries.
The Tax Act reduces the federal statutory income tax rate from 35.0% to 21.0% effective January 1, 2018. The Company re-measured the future tax benefit for deferred tax assets, which resulted in a $3.8 million adjustment to long-term deferred tax assets. This had no impact on the Company's income tax provision for the year ended December 31, 2017, as the effect of this re-measurement was offset by a corresponding change in the valuation allowance recorded against the Company's U.S. deferred tax assets.
The Transition Tax is a tax on previously untaxed accumulated earnings and profits (“E&P”) of certain foreign subsidiaries. The Transition Tax is determined based on, among other factors, the amount of post-1986 E&P of the relevant subsidiaries, as well as the amount of non-U.S. income taxes paid on such earnings. Because the Company has a net cumulative deficit on its E&P, it is not subject to the Transition Tax.
Prior to the effectiveness of the Tax Act, the Company did not recognize a deferred tax liability related to un-remitted foreign earnings because such earnings were expected to be reinvested indefinitely. Although the Company is not subject to the Transition Tax, an actual repatriation from its non-U.S. subsidiaries could still be subject to additional foreign withholding taxes and U.S. state taxes. However, it remains the Company's intention to reinvest the earnings from its non-U.S. subsidiaries. As of December 31, 2017, the Company estimates that it had $2.3 million of cumulative earnings upon which U.S. income taxes had not been provided.

Determination of the amount of unrecognized deferred tax liability with respect to un-remitted foreign earnings, if any, is not practicable.

Under GAAP, the Company is required to recognize the impact of tax legislation in the period in which the law was enacted.However, in December 2017, the Securities and Exchange Commission issued Staff Accounting Bulletin No. 118 (“SAB 118”), which allows the Company to record provisional amounts during a measurement period not to extend beyond one year from the Tax Act’s enactment date to allow the Company sufficient time to obtain, prepare and analyze information to complete the required accounting. SAB 118 requires that the Company include in its financial statements the reasonable estimate of the impact of the Tax Act on earnings to the extent such reasonable estimate has been determined. Accordingly, the income tax provision for the year ended December 31, 2017 includes the Company's reasonable estimates for re-measurement of deferred taxes and valuation allowance due to the change in tax rate and the Transition Tax, each as described above. Since the Tax Act was passed late in the fourth quarter of 2017, and ongoing guidance and accounting interpretation are expected over the next 12 months, the Company considers the accounting of other areas of the Tax Act to be incomplete. The Company expects to finalize the analysis and record any adjustments to provisional estimates within the measurement period in accordance with SAB 118.
The following table presents the significant components of the Company’s deferred tax assets and liabilities for the periods presented (in thousands):
 As of December 31,
 2017 2016
Deferred tax assets:   
Reserves and others$10,869
 $13,382
Stock-based compensation19,556
 29,402
Contribution carryforward
 11
Net operating loss carryforward8,115
 64,478
Tax credit carryforward14,183
 17,185
Gross deferred tax assets52,723
 124,458
Valuation allowance(30,895) (92,191)
Total deferred tax assets21,828
 32,267
Deferred tax liabilities:   
Depreciation and amortization(12,813) (30,140)
Disposal of a business unit

(7,152) 
Total deferred tax liabilities(19,965) (30,140)
Net deferred tax assets (liabilities)$1,863
 $2,127
Balances
Deferred income taxes reflect the net tax effects of temporary differences between carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes.
The Company maintained a valuation allowance against all U.S.following table presents the significant components of the Company’s deferred tax assets as of December 31, 2017 and 2016. The Company intends to continue maintaining a full valuation allowance on its deferred tax assets until there is sufficient evidence to supportliabilities for the reversal of all or some portion of these allowances. As of December 31, 2017, the Company believes it is more likely than not that its domestic deferred tax assets will not be realized. Accordingly, a full valuation allowance against domestic net deferred tax assets continues to be maintained.periods presented (in thousands):
As of December 31,
20192018
Deferred tax assets:
Reserves and others$6,547  $14,223  
Stock-based compensation19,950  19,689  
Net operating loss carryforward4,628  5,956  
Tax credit carryforward23,642  23,073  
Operating lease liabilities60,206  —  
Gross deferred tax assets114,973  62,941  
Valuation allowance(23,447) (18,381) 
Total deferred tax assets91,526  44,560  
Deferred tax liabilities: 
Depreciation and amortization(16,359) (16,666) 
Disposal of a business unit

—  (7,454) 
Deferred contract costs(3,869) (3,201) 
Operating lease right-of-use assets(51,244) —  
Total deferred tax liabilities(71,472) (27,321) 
Net deferred tax assets$20,054  $17,239  
At December 31, 2017,2019, the Company had federal and state net operating loss carry-forwards of approximately $17.7$10.7 million and $35.8$30.5 million, respectively, expiring beginning in 20332034 and 2018,2020, respectively. A wholly-ownedwholly owned entity, Yelp GmbH, also had trading losses of $7.6$2.4 million at December 31, 20172019 in Germany, which may be carried forward indefinitely against profits. Another wholly owned entity, Darwin Social Marketing Inc., had non-capital losses of $0.4 million at December 31, 2019 in Canada that begin to expire in 2037. At December 31, 2017,2019, the Company had federal research credit carry-forwards of approximately $7.4$18.5 million that expire beginning in 2024,2031, and California research credit carry-forwards of approximately $22.9$47.0 million that do not expire. At December 31, 2017, the Company also had $2.6 million of California Enterprise Zone credit, expiring beginning in 2024.
Utilization of net operating loss carry-forwards and credits may be subject to a substantial annual limitation due to the ownership change limitations provided by the Internal Revenue Code of 1986, as amended, and similar state provisions. The annual limitation may result in the expiration of net operating losses and credits before utilization. The Company does not expect any previous ownership changes, as defined under Section 382 and 383 of the Internal Revenue Code, to result in a limitation that will materially reduce the total amount of net operating loss carry-forwards and credits that can be utilized.
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Further, foreign loss carry-forwards may be subject to limitations under the applicable laws of the taxing jurisdictions due to ownership change limitations.

On December 22, 2017, the U.S. Tax Cuts and Jobs Act (the “Tax Act”) was signed into law. The Tax Act made broad and complex changes to the U.S. tax code that impact the Company's provision for income taxes, including, but not limited to, reducing the U.S. federal corporate income tax rate from 35.0% to 21.0% (the "Tax Rate Reduction") and requiring a one-time Deemed Repatriation Tax (the "Transition Tax”) on certain un-repatriated earnings of foreign subsidiaries.

Prior to the effectiveness of the Tax Act, the Company did not recognize a deferred tax liability related to un-remitted foreign earnings because such earnings were expected to be reinvested indefinitely. Because such earnings were previously subject to the one-time Transition Tax on foreign earnings, any taxes due with respect to such earnings or the excess of the amount for financial reporting over the tax basis of the Company's foreign investments would generally be limited to foreign and state taxes. As of December 31, 2019, the Company had accumulated undistributed earnings generated by its foreign subsidiaries of approximately $4.9 million. The Company has not recognized a deferred tax liability related to un-remitted foreign earnings, as it intends to indefinitely reinvest these earnings and expects future U.S. cash generation to be sufficient to meet future U.S. cash needs.

Deferred Tax Valuation Allowance
As more fully described in “Income Taxes” in Note 2,"Summary of Significant Accounting Policies," the Company maintains valuation allowances against deferred tax balances where appropriate and considers all positive and negative evidence that the Company would have future taxable income sufficient to realize the benefit of its deferred tax assets. 
At December 31, 2018, the Company considered all positive and negative evidence on whether the Company would have future taxable income sufficient to realize the benefit of its deferred tax assets and concluded that, at the required more-likely-than-not level of certainty, the Company would have future taxable U.S. income sufficient to realize the benefit of certain domestic deferred tax assets. As such, the valuation allowance previously recorded against certain domestic deferred tax assets was released. The benefit from income taxes for the year ended December 31, 2018 includes a $16.6 million benefit associated with this release.
Valuation allowances of $23.4 million and $18.4 million primarily related to California state tax credits were recorded against the Company's net deferred tax asset balance as of December 31, 2019 and 2018, respectively. Since the Company mainly conducts research and development activities in California, but earns a substantial portion of its U.S. income in other states, the Company could not assert, at the required more-likely-than-not level of certainty, that it will generate future taxable California income sufficient to realize the benefit of these deferred tax assets. Accordingly, the Company maintained a valuation allowance against specific state credits.
Unrecognized Tax Benefits
As of December 31, 2017, 20162019, 2018 and 2015,2017, the Company had $18.2$40.7 million, $10.3$33.1 million and $5.0$18.2 million, respectively, of unrecognized tax benefits. A reconciliation of the beginning and ending amount of unrecognized benefits is as follows (in thousands):
Year Ended December 31,Year Ended December 31,
2017 2016 2015201920182017
Balance at the beginning of the year$10,340
 $5,049
 $3,276
Balance at the beginning of the year$33,107  $18,215  $10,340  
Increase (decrease) based on tax positions related to the prior year667
 1,381
 (31)
(Decrease) increase based on tax positions related to the prior year(Decrease) increase based on tax positions related to the prior year(611) 3,654  667  
Increase based on tax positions related to the current year7,209
 4,131
 1,804
Increase based on tax positions related to the current year9,995  11,485  7,209  
Decrease from tax authorities' settlementsDecrease from tax authorities' settlements(1,773) —  —  
Lapse of statute of limitations(1) (221) 
Lapse of statute of limitations—  (247) (1) 
Balance at the end of the year$18,215
 $10,340
 $5,049
Balance at the end of the year$40,718  $33,107  $18,215  
As of December 31, 2017,2019, the Company had $0.9$23.4 million of unrecognized tax benefits that, if recognized, would affect the effective tax rate. The Company’s policy is to record interest and penalties related to unrecognized tax benefits as income tax expense. During each of the years ended December 31, 2017, 20162019, 2018 and 2015,2017, the Company recorded an immaterial amount of interest and penalties.
In addition, the Company is subject to the continuous examination of its income tax returns by the IRS and other tax authorities. The Company’s federal and state income tax returns for fiscal years subsequent to 2003 remain open to
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examination. In the Company’s most significant foreign jurisdictions – Canada, Ireland, United Kingdom and Germany – the tax years subsequent to 20102014 remain open to examination. The Company regularly assesses the likelihood of adverse outcomes resulting from examinations to determine the adequacy of its provision for income taxes, and monitors the progress of ongoing discussions with tax authorities and the impact, if any, of the expected expiration of the statute of limitations in various taxing jurisdictions. The Company believes that an adequate provision has been made for any adjustments that may result from tax examinations. However, the outcome of tax audits cannot be predicted with certainty. If any issues addressed in the Company’s tax audits are resolved in a manner not consistent with management’s expectations, the Company could be required to adjust its provision for income taxes in the period such resolution occurs. Although the timing of the resolution or closure of audits is not certain, the Company believes that it is reasonably possible that its unrecognized tax benefits could be reduced by an immaterial amount over$0.1 million within the next 12 months following December 31, 2017.months.

16.
19. NET INCOME (LOSS) PER SHARE
Basic and diluted net income (loss) per share attributable to common stockholders for periods prior to the Conversion are presented in conformity with the “two-class method” required for participating securities. Prior to the Conversion, shares of Class A and Class B common stock were the only outstanding equity in the Company. The rights of the holders of Class A and Class B common stock were identical, except with respect to voting and conversion. Each share of Class A common stock was entitled to one vote per share and each share of Class B common stock was entitled to ten votes per share. Shares of Class B common stock were convertible into Class A common stock at any time at the option of the stockholder, and were automatically converted upon sale or transfer to Class A common stock, subject to certain limited exceptions, and in connection with certain other conversion events.
Under the two-class method, basic net income (loss) per share is computed using the weighted-average number of outstanding shares of common stock outstanding during the period. Diluted net income (loss) per share is computed using the weighted-average number of outstanding shares of common stock and, ifwhen dilutive, potential shares of common stock outstanding during the period. The Company’s potentialPotential common shares of common stock consist of the incremental shares of common stock issuable upon the exercise of stock options, shares issuable upon the vesting of RSUs (including PRSUs), and, to a lesser extent,purchases purchase rights related to the ESPP. The dilutive effect of these potential shares of common stock is reflected in diluted earnings per share by application of the treasury stock method. The computation of the diluted net income (loss) per share of Class A common stock assumes the conversion of Class B common stock, while the diluted net income (loss) per share of Class B common stock does not assume the conversion of Class B common stock.
The undistributed earnings are allocated based on the contractual participation rights of the Class A and Class B common stock as if the earnings for the year have been distributed. As the liquidation and dividend rights are identical, the undistributed earnings are allocated on a proportionate basis. Further, as the conversion of Class B common stock is assumed in the computation of the diluted net income (loss) per share of Class A common stock, the undistributed earnings are equal to net income (loss) for that computation.
On September 22, 2016, the Company’s Class A and Class B common stock converted into a single class of common stock. Because shares of Class A and Class B common stock were outstanding for a portion of the year ended December 31, 2016, the Company has disclosed earnings per common share for both classes of common stock for such reporting period. Basic and diluted

net income (loss) per share attributable to common stockholders for periods after the Conversion, including the current reporting period, are presented based on the number of shares of common stock then outstanding.
The following table presents the calculation of basic and diluted net income (loss) per share (in thousands, except per share data):
Year Ended December 31,
201920182017
Basic net income per share attributable to common stockholders:
Numerator:
Net income$40,881  $55,350  $152,995  
Denominator:
Weighted-average shares outstanding74,627  83,573  81,602  
Basic net income per share attributable to common stockholders:$0.55  $0.66  $1.87  
 Year Ended December 31,
 2017 2016 2015
 Common Stock Class A Class B Class A Class B
Basic net income (loss) per share attributable to common stockholders:         
Numerator:         
Net income (loss)$152,858
 $(4,296) $(374) $(28,694) $(4,206)
Allocation of undistributed earnings$152,858
 $(4,296) $(374) $(28,694) $(4,206)
Denominator:         
Weighted-average shares outstanding81,602
 70,997
 6,189
 65,135
 9,548
Basic net income (loss) per share attributable to common stockholders:$1.87
 $(0.06) $(0.06) $(0.44) $(0.44)

Year Ended December 31,
Year Ended December 31,201920182017
2017 2016 2015
Common Stock Class A Class B Class A Class B
Diluted net income (loss) per share attributable to common stockholders:         
Diluted net income per share attributable to common stockholders:Diluted net income per share attributable to common stockholders:
Numerator:         Numerator:
Allocation of undistributed earnings for basic calculations$152,858
 $(4,296) $(374) $(28,694) $(4,206)Allocation of undistributed earnings for basic calculations$40,881  $55,350  $152,995  
Reallocation of undistributed earnings as a result of conversion from Class B to Class A shares
 (374) 
 (4,206) 
Allocation of undistributed earnings$152,858
 $(4,670) $(374) $(32,900) $(4,206)
Denominator:         Denominator:
Number of shares used in basic calculation81,602
 70,997
 6,189
 65,135
 9,548
Number of shares used in basic calculation74,627  83,573  81,602  
Weighted-average effect of dilutive securities         Weighted-average effect of dilutive securities
Conversion of Class B to Class A common shares outstanding
 6,189
 
 9,548
 
Stock options3,279
 
 
 
 
Stock options2,367  2,984  3,279  
Restricted stock units2,289
 
 
 
 
Restricted stock units973  2,137  2,289  
Employee stock purchase programEmployee stock purchase program 15  —  
Number of shares used in diluted calculation87,170
 77,186
 6,189
 74,683
 9,548
Number of shares used in diluted calculation77,969  88,709  87,170  
Diluted net income (loss) per share attributable to common stockholders$1.75
 $(0.06) $(0.06) $(0.44) $(0.44)
Diluted net income per share attributable to common stockholdersDiluted net income per share attributable to common stockholders$0.52  $0.62  $1.76  
The following weighted-average stock-based instruments were excluded from the calculation of diluted net income (loss) per share because their effect would have been anti-dilutive for the periods presented (in thousands):
Year Ended December 31,
201920182017
Stock options2,580  2,030  1,659  
Restricted stock units and awards2,020  373  593  

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 Year Ended December 31,
 2017 2016 2015
Stock options1,659
 2,082
 8,206
Restricted stock units and awards593
 2,090
 4,095
Contingently issuable shares
 
 309
20. INFORMATION ABOUT REVENUE AND GEOGRAPHIC AREAS
17.RELATED PARTY TRANSACTIONS
The Company does not have any significant related party transactions.
18.INFORMATION ABOUT REVENUE AND GEOGRAPHIC AREAS
The Company considers operating segments to be components of the Company that engage in business activities and for which discreteseparate financial information is available that isand evaluated regularly by the Company’s chief operating decision maker in deciding how to allocate resources and in assessing performance. The chief operating decision maker for the Company is the chief executive officer. The chief executive officer reviews financial information presented on a consolidated basis, accompanied by information about revenue by product line and geographic region for purposes of allocating resources and evaluating financial performance.
The Company has one business activity and there are no segment managers who are held accountable for operations, operating results or plans for levels or components below the consolidated unit level. Accordingly, the Company has determined that it has a single operating and reporting segment. When the Company communicates results externally, it disaggregates net revenue into major product lines and primary geographical markets, which is based on the billing address of the customer. The disaggregation of revenue by major product lines is based on the type of service provided and also aligns with the timing of revenue recognition.
Net Revenue
The following table presents the Company’s net revenue by product line for the periods presented (in thousands):
Year Ended December 31,Year Ended December 31,
2017 2016 2015201920182017
Net revenue by product:     Net revenue by product:
Advertising$771,644
 $645,241
 $471,416
Advertising$976,925  $907,487  $775,678  
Transactions60,251
 62,495
 43,854
Transactions12,436  13,694  60,251  
Other services14,918
 5,333
 3,429
Other services24,833  21,592  14,918  
Brand advertising
 
 31,012
Total net revenue$846,813
 $713,069
 $549,711
Total net revenue$1,014,194  $942,773  $850,847  
During the years ended December 31, 2017, 20162019, 2018 and 2015,2017, no individual customer accounted for 10% or more of consolidated net revenue.
Revenue by geography is based on the billing address of the customer. The following table presents the Company’s net revenue by geographic region for the periods indicated (in thousands):
Year Ended December 31,Year Ended December 31,
2017 2016 2015201920182017
United States$832,732
 $698,244
 $537,567
United States$1,000,245  $929,569  $836,766  
All other countries14,081
 14,825
 12,144
All other countries13,949  13,204  14,081  
Total net revenue$846,813
 $713,069
 $549,711
Total net revenue$1,014,194  $942,773  $850,847  
Long-Lived Assets
The following table presents the Company’s long-lived assets by geographic region for the periods indicated (in thousands):
As of December 31,
20192018
United States$109,849  $112,984  
All other countries1,100  1,816  
Total long-lived assets$110,949  $114,800  

21. RESTRUCTURING AND INTEGRATION
 As of December 31,
 2017 2016 2015
United States$100,990
 $89,362
 $78,675
All other countries2,661
 3,078
 5,493
Total long-lived assets$103,651
 $92,440
 $84,168

19.RESTRUCTURING AND INTEGRATION
The following table presents the Company’s restructuring and integration costs for the periods indicated (in thousands):
 
Year Ended December 31,
 2017 2016 2015
Restructuring and integration$288
 $3,455
 $
On November 2, 2016, the Company announced plans to significantly reduce sales and marketing activities in markets outside of the United States and Canada. The$0.3 million of restructuring and integration costs were incurred during 2017, and the restructuring plan was substantially completed by December 31, 2016.2017. All costs related to this plan were paid by this date. The Company incurred $0.3 million and $3.5 million for the year ended December 31, 2017 and 2016, respectively, in0 restructuring and integration costs associated with this plan relatedduring the years ended December 31, 2019 and 2018 and does not expect to severance costs for affected employees. Anyincur any additional expenseexpenses related to this restructuring plan incurred in the future is expected to be immaterial.plan. No goodwill, intangible assets or other long-lived assets were impaired as a result of the restructuring plan.

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22. SUBSEQUENT EVENTS
On January 15, 2020, the Company's board of directors authorized the repurchase of an additional $250 million of the Company's common stock pursuant to its stock repurchase program, bringing the total amount authorized since the commencement of the stock repurchase program to $950 million, of which $269 million remains available.

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SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)
(In thousands, except per share data)
The amount related to this plan that remained unpaid was zero and $1.5 million asfollowing tables set forth the Company's unaudited quarterly consolidated statements of operations data for each of the eight quarters in the two-year period ended December 31, 20172019 (in thousands, except per share data). The Company has prepared this quarterly data on a consistent basis with the audited consolidated financial statements included in this Annual Report. In the opinion of management, the quarterly financial information reflects all necessary adjustments, consisting only of normal recurring adjustments, necessary for a fair presentation of this data. This information should be read in conjunction with the audited financial statements and 2016, respectively.related notes included elsewhere in this Annual Report. The results of historical periods are not necessarily indicative of the results of operations for any future period.
20.SUBSEQUENT EVENTS
None.
Quarter Ended
Dec 31, 2019Sep 30, 2019Jun 30, 2019Mar 31, 2019Dec 31, 2018Sep 30, 2018Jun 30, 2018Mar 31, 2018
Consolidated Statements of
Operations Data:
 
Net revenue$268,823  $262,474  $246,955  $235,942  $243,740  $241,096  $234,863  $223,074  
Costs and expenses:
Cost of revenue (exclusive of depreciation and amortization shown separately below)16,656  16,514  14,975  14,265  14,255  14,177  14,708  14,732  
Sales and marketing126,370  127,655  122,045  124,316  121,256  121,759  120,653  119,641  
Product development61,138  56,661  54,566  58,075  54,273  53,764  52,789  51,493  
General and administrative34,164  39,703  30,932  31,292  29,677  30,302  28,583  32,007  
Depreciation and amortization12,849  12,391  12,240  11,876  11,557  10,713  10,509  10,028  
Total costs and expenses251,177  252,924  234,758  239,824  231,018  230,715  227,242  227,901  
Income (loss) from operations17,646  9,550  12,197  (3,882) 12,722  10,381  7,621  (4,827) 
Other income, net2,611  3,063  3,891  4,691  4,160  3,921  3,424  2,604  
Income (loss) before income taxes20,257  12,613  16,088  809  16,882  14,302  11,045  (2,223) 
Provision for (benefit from) income taxes3,105  2,552  3,785  (556) (15,064) (684) 341  63  
Net income (loss) attributable to
common stockholders
$17,152  $10,061  $12,303  $1,365  $31,946  $14,986  $10,704  $(2,286) 
Net income (loss) per share attributable
to common stockholders:
Basic$0.24  $0.14  $0.16  $0.02  $0.39  $0.18  $0.13  $(0.03) 
Diluted$0.24  $0.14  $0.16  $0.02  $0.37  $0.17  $0.12  $(0.03) 
Weighted-average shares used to compute net income (loss) per share attributable to common stockholders:
Basic70,627  70,773  75,601  81,772  82,706  84,008  83,769  83,785  
Diluted72,987  73,712  78,530  85,087  86,287  88,724  88,651  83,785  


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