Exhibit 99.1

Zynga Q4 2017 Earnings Highlights RECORD MOBILE REVENUE & BOOKINGS Mobile Revenue = $203.6M Mobile Bookings = $197.0M Q4 2017 = +32% Y/Y Q4 2017 = +18% Y/Y $167M $155M Q4’16 $176M $162M Q1’17 $182M $180M Q2’17 $194M $187M Q3’17 $204M $197M Q4’17 Mobile Revenue Mobile Bookings SUCCESSFUL LAUNCH OF NEW GAME WORDS with friends 2 Best quarterly mobile performance in franchise history MOBILE REVENUE +19% Y/Y MOBILE BOOKINGS +28% Y/Y #1 FREE APP* #1 FREE GAME* *Achieved in Apple App Store Q4’17 AUDIENCE q4’17 NET INCOME 20M Mobile DAUs +24% Y/Y 76M Mobile MAUs +45%Y/Y $12.9M +$48.4M Y/Y

ZYNGA – Q4 2017 QUARTERLY EARNINGS LETTER

February 7, 2018

Dear Shareholders,

We look forward to discussing our Q4 2017 and full year 2017 results during today’s earnings call at 2:30 p.m. PT. Below, you’ll find our quarterly earnings letter detailing our Q4 and 2017 performance, as well as our outlook for Q1 and growth opportunities for 2018 and beyond. Please note that we manage our business based on topline measures including revenue, which is comprised of the change in deferred revenue and bookings. Revenue and the change in deferred revenue are both directly affected by bookings results, and management utilizes bookings as a primary topline measure to help inform their decisions.

HIGHLIGHTS

We had a strong holiday quarter and a great end to the year anchored by the successful new game launch of Words With Friends 2 and continued mobile momentum in our live services. In 2017, we improved the fundamentals of our business and drove substantial growth across our topline, audience, profitability and operating cash flow. We’re starting 2018 with the strongest mobile game portfolio in company history, and we’re excited about the new titles we have in development across our global studios. Our performance and execution over the last year gives us confidence in our ability to grow the company and achieve our near-term margin goals later this year.

Q4 Highlights:

2017 Highlights:

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EXECUTIVE SUMMARY

In Q4, we delivered our strongest topline performance since Q1 2013. Revenue was $233.3 million, above our guidance by $18.3 million and up $42.7 million or 22% year-over-year. Bookings were $223.8 million – beating our guidance by $13.8 million and up $22.3 million or 11% year-over-year. Our better than expected performance was driven by the successful launch of Words With Friends 2, as well as a partial month contribution from our acquisition of Peak Games’ casual card game studio. We achieved net income of $12.9 million, an improvement of $48.4 million year-over-year, broadly in-line with our guidance of $13.0 million. Our Adjusted EBITDA was $46.5 million, above our guidance by $11.5 million, and an increase of $35.9 million year-over-year. We had a net release of deferred revenue of $9.5 million versus our guidance of a net release of $5.0 million and a net increase of $11.0 million in the prior year quarter. The year-over-year change in deferred revenue accounted for $20.5 million of the year-over-year increase in revenue, net income and Adjusted EBITDA. We delivered operating cash flow of $26.4 million, down $1.4 million year-over-year, due to an increase in accounts receivable, partially offset by improved profitability.

Our quarterly performance was anchored by the successful launch of Words With Friends 2 and our commitment to growing our live services, including a standout performance from CSR2 and continued strength of Zynga Poker.

Words With Friends delivered its strongest quarterly mobile revenue and bookings performance in the franchise’s 8-year history, with mobile revenue up 19% year-over-year and mobile bookings up 28% year-over-year. The record quarter was driven by the successful launch of our new game, Words With Friends 2, as well as a significant, one-time yield benefit from an advertising network deal tied to the game’s debut. Since launching in November, Words With Friends 2 has received positive partner featuring from Google and Apple, and achieved #1 Free App, #1 Free Game and #1 Free Word Game rankings in the App Store. The new game builds on this popular franchise by adding some of the most requested features from our players, such as Solo Challenge and Lightning Round, in addition to introducing boosts such as Tile Swap, Hindsight and Word Radar. These new features have been positively received by players, resulting in increased player engagement and an expansion of the monetization potential of the game.

CSR2 ended the year with strong results driven by innovative bold beats and exclusive events for players. In Q4, revenue was up 90% year-over-year and bookings were up 27% year-over-year. This quarter, we released our Fast & Furious finale event in partnership with Universal Brand Development, which featured a new Siberia-themed racetrack based on the film. We also launched Relay Races – a new way for players to compete with one another. Finally, we leveraged Apple’s ARKit to introduce CSR2’s Augmented Reality (AR) mode in November, giving players the ability to virtually bring their dream car collection off the mobile screen and into their driveways. Since the game’s worldwide launch, CSR2 has delighted millions of players and remains the #1 Top Grossing Racing game in the U.S. App Store and on Google Play.

In Social Casino, Zynga Poker ended a particularly exciting year with Q4 mobile revenue up 44% year-over-year and mobile bookings up 38% year-over-year. This performance was driven by improved player engagement with popular features such as Challenges and Leagues. 2017 marked a pivotal year for Zynga Poker as the franchise turned 10 years old and reached all-time highs in mobile revenue and bookings. In the quarter, our Slots mobile revenue was down 12% year-over-year and mobile bookings were down 8% year-over-year. This decline is a result of our commitment to quality over quantity as our teams focused on deeper player engagement and increased monetization across our core slots games.

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In 2017, we improved the fundamentals of the business by sharpening our operating model, enhancing our live services and innovating into new games and emerging mobile technologies. This focus strengthened our position as a leading mobile game publisher as we delivered total company revenue of $861.4 million, up 16% year-over-year, and bookings of $853.8 million, up 13% year-over-year. This topline growth was driven by the mobile performance of our forever franchises, which more than offset the headwinds we continue to face in our web and older mobile games.

Our mobile momentum over the past year continued with mobile revenue up 29% year-over-year and mobile bookings up 23% year-over-year. Mobile revenue last year represented 86% of total revenue, up from 77% a year ago, and mobile bookings represented 87% of our total bookings, up from 80% in 2016. Mobile online game – or user pay – revenue was up 36% year-over-year, and mobile user pay bookings were up 28% year-over-year. A key strategic initiative for us in 2017 was to grow our audience and Q4 represented Zynga’s highest mobile average DAUs in 4 years. This past quarter, we significantly increased our mobile audience from 16 million average DAUs in Q4 2016 to 20 million average DAUs in Q4 2017, up 24% year-over-year driven primarily by Solitaire and Zynga Poker. Mobile average MAUs are also up, from 53 million in Q4 2016 to 76 million in Q4 2017, an increase of 45% year-over-year. We remain focused on growing our audience and broadening the accessibility of our games across existing and new emerging platforms.

This year, we also made two acquisitions with Harpan’s Solitaire games in Q1 and Peak Games’ casual card game studio in Q4. These acquisitions align with our strategy to grow our live services and prioritize opportunities that are accretive to our near-term margin goals. They also helped to grow our audience, and strengthen our development talent with a high-quality team in Turkey with a proven track record. The combination of Zynga Poker, our Solitaire titles and Peak Games’ casual card games now gives Zynga the world’s largest portfolio of casual card games.

We also made substantial improvements in sharpening our operating model in 2017. We delivered GAAP operating expenses for the year at 67% of revenue – down from 83% of revenue in 2016 – and non-GAAP operating expenses at 58% of bookings – down from 66% of bookings last year. All of this contributed to achieving $26.6 million of net income, up $134.8 million year-over-year, and operating cash flow of $94.6 million, up 58% year-over-year. 2017 was a significant year in our turnaround – we’re proud of the progress we made in growing the company and we’re well on our way to achieving our near-term margin goals later this year.

As we look to the future, our strategy is to grow Zynga in four ways: (1) Live Services, (2) New Games, (3) Emerging Platforms and (4) M&A.

First, we’ll continue to focus on growing our live services through innovative bold beats. We’ve seen this approach pay off over the last two years as we’ve enhanced and grown our forever franchises into the strongest mobile portfolio in company history. Our bold beat strategy is designed to deepen engagement with our existing players, bring back lapsed players and attract new players to our franchises. For Zynga, bold beats include new features, new systems and new content, such as global licenses and strategic partnerships that enhance the player experience. On that front, we’re pleased to announce that we’ve entered into a multi-year partnership with the World Poker Tour® (WPT®) – the premiere name in international, televised gaming and entertainment – to bring the WPT experience into Zynga Poker for in-game, free-to-play tournaments. We expect to introduce our WPT-themed in-game bold beat tournaments to Zynga Poker in the second half of 2018, delivering players a more competitive, authentic tournament experience. Overall, we believe our continued commitment to growth in live services will provide a more predictable and recurring revenue stream for Zynga over the long-term.

Second, we’ll also pursue growth by building new games with the goal of creating new forever franchises. Our approach to new game development combines strong game teams with high potential sequels, reinvigorated Zynga brands, new intellectual properties (IP) and strategic licenses with global appeal. We have games in development in four categories – Action Strategy, Casual, Invest Express and Social Casino. Our goal is to engineer hits and rigorously test our new games during soft launch to ensure they have the right long-term engagement and have the potential to be a forever franchise for us. We’re tuning to quality over quantity and, based on player feedback and soft launch results, we expect to launch new titles in some or all of these categories beginning in the second half of 2018 and continuing into 2019 and beyond.

Third, mobile is the largest and fastest growing gaming platform in the world and we believe emerging technologies – including chat, AR, virtual reality and 5G wireless networking – will create the next phase of long-term platform growth. We’re actively investing in the mobile platform, particularly chat, because of its potential to drive innovation, create new gaming experiences and grow our audience. We believe that chat platforms, such as Facebook Instant Games and Apple iMessage, will reshape the accessibility and social nature of mobile gaming. This year, we’ll continue to bring our existing franchises, like Words With Friends, and new IP to these highly social, new mobile platforms. Our goal is to deliver a high-quality player experience and build our audience on chat, however, we don’t expect monetization to have a meaningful impact in 2018.

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Finally, we intend to use the strength of our balance sheet and positive cash flow from operations to explore M&A opportunities that will enhance our growth potential. Our goal is to bring talented teams and compelling franchises into Zynga that align with our strategic priorities to grow our live services, create new forever franchises and build out our capabilities on emerging platforms. We’ll continue to take a diligent approach towards M&A, prioritizing opportunities that are accretive to our near-term margin goals.

2017 & Q4 PERFORMANCE OVERVIEW

2017 Financial Highlights

Q4 Financial Highlights

Q4 Mobile Highlights

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Q4 Advertising Highlights

Q4 Player Metrics (users and payers in millions)

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2018 FINANCIAL THEMES

We anticipate our financial performance in 2018 will be predominantly driven by our live services anchored by our forever franchises, with continued investment in bold beats aimed at enhancing player engagement. Our investments in new games and emerging mobile technologies should have more of an effect on our growth in 2019 and beyond.

We expect moderate growth in revenue and bookings driven by:

Our topline performance should be weighted towards the second half of the year due to seasonality and the cadence of our live service bold beats.

We’re going to continue our disciplined approach to sharpening our operating model and are targeting:

Our performance and execution over the last year gives us confidence in our ability to grow the company and achieve our near-term margin goals later this year.

FINANCIAL GUIDANCE

Q1 Guidance

Some additional factors to consider in assessing our Q1 guidance include:

In closing, we’re proud of the results we delivered in 2017 and are excited by the potential ahead of us in 2018. The significant improvement in our fundamentals gives us confidence in our ability to grow Zynga over the long-term as we connect the world through games and deliver value to our players, employees and investors.

Sincerely,

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CONTACTS

Rebecca Lau
Director, Investor Relations & Corporate Finance
relau@zynga.com

Dani Dudeck
Chief Communications Officer
dani@zynga.com

FORWARD-LOOKING STATEMENTS

This letter contains forward-looking statements, including those statements relating to our outlook for the first quarter and full year 2018 under the headings “2018 FINANCIAL THEMES” and "FINANCIAL GUIDANCE" and statements relating to, among other things: our operational performance and progress in our turnaround; our operational strategy, including our focus on live services, growth projections relating to our mobile forever franchises, and our belief that live services will provide increased predictability in recurring revenue over the long-term; our continued investment in game innovations; our plans to acquire additional games and IP assets; our partnership with the World Poker Tour (WPT), including the development, launch and success of future game features; our expectations regarding customer adoption; our ability to successfully launch new games and enhance existing games; the success of new product and feature launches and other special events; the prospect of emerging game platforms and features, such as augmented reality, chat and next generation wireless networks, including our belief in the growth of mobile as a gaming platform driving growth in our industry; our expectations regarding the advertising market, including anticipated trends in that market; our expectations in the mobile game industry, including anticipated trends in that market; our expectations regarding the acquisition of the mobile card game studio of Peak Games, including our ability to successfully integrate the acquired games and other assets into our business and operations; our belief that we operate the world’s largest casual mobile card game portfolio; our performance expectations regarding our legacy portfolio of web and older mobile games; and our ability to achieve financial projections, including revenue, bookings, income and margin goals.

Forward-looking statements often include words such as "outlook," "projected," "intends," "will," "anticipate," "believe," "target," "expect," and statements in the future tense are generally forward-looking. The achievement or success of the matters covered by such forward-looking statements involves significant risks, uncertainties, and assumptions. Our actual results could differ materially from those predicted or implied and reported results should not be considered as an indication of our future performance. Undue reliance should not be placed on such forward-looking statements, which are based on information available to us on the date hereof. We assume no obligation to update such statements. More information about factors that could affect our operating results are described in greater detail in our public filings with the Securities and Exchange Commission (the “SEC”), copies of which may be obtained by visiting our Investor Relations web site at http://investor.zynga.com or the SEC's web site at www.sec.gov.

In addition, the preliminary financial results set forth in this letter are estimates based on information currently available to us. While we believe these estimates are meaningful, they could differ from the actual amounts that we ultimately report in our Annual Report on Form 10-K for the quarter and full year ended December 31, 2017. We assume no obligation and do not intend to update these estimates prior to filing our Annual Report on Form 10-K.

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NON-GAAP FINANCIAL MEASURES

We have provided in this letter certain non-GAAP financial measures to supplement our consolidated financial statements prepared in accordance with U.S. GAAP (our “GAAP financial statements”). Management uses non-GAAP financial measures internally in analyzing our financial results to assess operational performance and liquidity. Our non-GAAP financial measures may be different from non-GAAP financial measures used by other companies.

The presentation of our non-GAAP financial measures is not intended to be considered in isolation or as a substitute for, or superior to, our GAAP financial statements. We believe that both management and investors benefit from referring to our non-GAAP financial measures in assessing our performance and when planning, forecasting and analyzing future periods. We believe our non-GAAP financial measures are useful to investors because they allow for greater transparency with respect to key financial measures we use in making operating decisions and because our investors and analysts use them to help assess the health of our business.

We have provided reconciliations of our non-GAAP financial measures used in this letter to the most directly comparable GAAP financial measures in the following tables. Because of the following limitations of our non-GAAP financial measures, you should consider the non-GAAP financial measures presented in this letter with our GAAP financial statements.

Key limitations of our non-GAAP financial measures include:

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ZYNGA INC.

CONSOLIDATED BALANCE SHEETS

(In thousands, unaudited)

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CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except per share data, unaudited)

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ZYNGA INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands, unaudited)

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RECONCILIATION OF GAAP TO NON-GAAP RESULTS

(In thousands, except per share data, unaudited)

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RECONCILIATION OF GAAP TO NON-GAAP FIRST QUARTER 2018 GUIDANCE

(In thousands, except per share data, unaudited)