1994-10 · first
The first banner ad
HotWired, Wired magazine's website, sells the first widely recognised web banner, an AT&T ad that went live on October 27, 1994. Source
Three decades of ad tech
From one banner on one website in 1994 to trillions of auctions a year.
1996 · standard
IAB is formed
The Internet Advertising Bureau (now Interactive Advertising Bureau) is founded as the trade body for online advertising and begins setting ad sizes and guidelines. Source
1996-02 · first, platform
DoubleClick is founded
Kevin O'Connor and Dwight Merriman start DoubleClick in New York; its ad server becomes the backbone of display advertising. Source
1998 · first
Pay-per-click search arrives
GoTo.com, an Idealab spin-off later renamed Overture, lets advertisers bid for placement in search results and pay only when someone clicks. Source
2000-10 · first, platform
Google launches AdWords
Google opens a self-service advertising programme alongside search results; it later adopts pay-per-click auctions ranked partly by ad quality. Source
2003-06 · platform
Google AdSense opens to publishers
AdSense lets any website show contextually matched Google ads and share the revenue, bringing search-style ads to the wider web. Source
2003-07 · deal
Yahoo buys Overture
Yahoo acquires the pay-per-click pioneer, which becomes Yahoo Search Marketing. Source
2004-08 · deal
Google goes public
Google lists on Nasdaq at $85 a share via a modified Dutch auction, funded almost entirely by search advertising. Source
2006 · fraud
Google settles a click-fraud class action
Google agrees to a settlement worth up to $90 million in credits over advertisers' claims that they were charged for fraudulent clicks, putting click fraud in the headlines. Source
2007-04 · deal
Google agrees to buy DoubleClick
Google announces a $3.1 billion all-cash deal for DoubleClick. Days later Yahoo buys ad exchange Right Media and, in May, WPP buys 24/7 Real Media and Microsoft buys aQuantive. Source
2007-05 · deal
Microsoft buys aQuantive
Microsoft agrees to pay about $6 billion for aQuantive, owner of the Atlas ad server; it writes off most of that value in 2012. Source
2008 · standard
VAST 1.0 standardises video ads
The IAB releases the Video Ad Serving Template, a common format for sending video ads to players; later versions become the basis of CTV advertising. Source
2008-03 · deal, regulation
Google closes DoubleClick
After US and EU regulators clear the deal, Google completes the purchase that gives it the leading publisher and advertiser ad servers. Source
2009 · first, platform
Real-time bidding takes off
Exchanges begin auctioning each impression in milliseconds as a page loads, replacing many pre-negotiated network deals; Google's relaunched DoubleClick Ad Exchange supports it. Source
2009-11 · deal
Google buys AdMob
Google pays $750 million in stock for the leading mobile ad network as the app economy grows. Source
2010-11 · standard
OpenRTB effort begins
Supply and demand companies form a consortium to write an open protocol for real-time bidding; OpenRTB later moves under the IAB. Source
2012-05 · deal
Facebook goes public
Facebook raises about $16 billion at $38 a share, then has to prove it can make money from mobile ads. Source
2013-07 · deal
Publicis and Omnicom announce a merger
The two agency groups plan a "merger of equals" worth about $35 billion; it collapses in May 2014. Source
2014 · standard
IAB Tech Lab is set up
The IAB creates a dedicated technical standards body, which goes on to run OpenRTB, VAST, ads.txt and the Open Measurement SDK. Source
2014 · standard, fraud
TAG is founded
The ANA, 4A's and IAB create the Trustworthy Accountability Group to fight ad fraud, malware and piracy across the supply chain. Source
2014-06 · standard
MRC defines a viewable impression
The Media Rating Council finalises its viewability guideline: 50% of an ad's pixels on screen for one second (two seconds for video). Source
2015 · first, standard
Header bidding and Prebid.js
Publishers start letting many exchanges bid at once before calling their ad server, weakening Google's "last look"; AppNexus open-sources Prebid.js. Source
2015-10 · standard
IAB LEAN ads principles
Facing the rise of ad blockers, IAB Tech Lab proposes "LEAN" ads: light, encrypted, ad-choice supported and non-invasive.
2015-10 · standard, fraud
MRC invalid traffic guidelines
The MRC publishes its IVT addendum, splitting invalid traffic into general (GIVT) and sophisticated (SIVT) and requiring measurers to filter both. Source
2016 · standard, fraud
TAG Certified Against Fraud launches
TAG's anti-fraud certification gives buyers a way to choose supply paths where every company follows the same invalid-traffic rules. Source
2016-04 · privacy, regulation
GDPR is adopted
The EU adopts the General Data Protection Regulation, with a two-year run-up before it applies. Source
2016-09 · deal
The Trade Desk goes public
The independent DSP lists on Nasdaq at $18 a share and becomes one of ad tech's most valuable companies. Source
2016-12 · fraud
Methbot exposed
White Ops reveals a bot operation faking video views on spoofed premium sites, estimated at $3–5 million a day. Source
2017 · standard, fraud
ads.txt is released
IAB Tech Lab launches ads.txt so publishers can publicly list who is authorised to sell their inventory, a direct response to domain spoofing. Source
2017-03 · platform
YouTube brand-safety boycott
Major advertisers pull YouTube spending after ads appear next to extremist videos, turning brand safety into a board-level issue.
2017-05 · fraud
Judy click-fraud apps
Check Point finds auto-clicking code in dozens of Android games downloaded millions of times. Source
2017-06 · privacy, platform
Safari announces Intelligent Tracking Prevention
Apple's WebKit team unveils ITP, which limits cross-site cookies in Safari and starts the decline of third-party cookies. Source
2017-11 · fraud
Hyphbot uncovered
Adform discloses a botnet of infected home PCs generating traffic on tens of thousands of spoofed domains. Source
2018 · standard
Open Measurement SDK released
IAB Tech Lab releases OM SDK so verification companies can measure ads inside apps through one shared integration. Source
2018-02 · standard, platform
Chrome starts blocking intrusive ads
Chrome begins filtering ads on sites that fail the Coalition for Better Ads standards. Source
2018-03 · privacy, platform
Cambridge Analytica scandal
Reports that a political consultancy harvested data on millions of Facebook users trigger a global backlash over data sharing for ad targeting. Source
2018-04 · standard, privacy
IAB Europe launches TCF
The Transparency & Consent Framework gives publishers and vendors a shared way to collect and pass GDPR consent. Source
2018-05 · privacy, regulation
GDPR applies
The GDPR takes effect on May 25, 2018, forcing consent banners across the web and fines of up to 4% of global turnover. Source
2018-06 · deal
AT&T buys AppNexus
AT&T acquires the largest independent ad exchange, reported at about $1.6 billion, and renames it Xandr. Source
2018-11 · fraud
3ve dismantled
Google, White Ops and the FBI take down a botnet of 1.7 million infected computers; US prosecutors indict eight people. Source
2018-11 · fraud
Click-injection apps exposed
Kochava and BuzzFeed News report popular apps from Cheetah Mobile and Kika claiming credit for installs they did not drive. Source
2019-03 · regulation
EU fines Google €1.49 billion over AdSense
The European Commission fines Google for restrictive clauses that kept rival search ads off third-party websites. Source
2019-04 · deal
Publicis buys Epsilon
Publicis agrees to pay $4.4 billion for the marketing data company, putting data at the heart of agency strategy. Source
2019-07 · standard, fraud
sellers.json and SupplyChain object
IAB Tech Lab finalises two standards that let buyers see every company in a bid request's path and look up who they are. Source
2019-09 · platform
Google Ad Manager moves to first-price
Google completes the switch of its exchange to a unified first-price auction, following much of the industry. Source
2020 · privacy, standard
Unified ID 2.0 proposed
The Trade Desk proposes UID2, an open identifier built from hashed and encrypted email addresses, as a cookie alternative. Source
2020 · fraud
PARETO CTV spoofing disrupted
White Ops, Roku and Google disrupt an operation in which Android phones pretended to be streaming TVs to earn premium CTV prices. Source
2020-01 · privacy, regulation
CCPA takes effect
California's Consumer Privacy Act gives residents the right to opt out of the sale of their personal data. Source
2020-01 · privacy, platform
Chrome plans to end third-party cookies
Google says it will phase out third-party cookies in Chrome within two years, launching the Privacy Sandbox effort. Source
2020-05 · standard
ISBA/PwC finds an "unknown delta"
A UK study finds publishers get about half of programmatic spend and 15% cannot be traced to anyone. Source
2020-06 · regulation, platform
India bans TikTok and dozens of Chinese apps
India blocks 59 Chinese apps including TikTok, instantly reshaping the country's short-video and mobile ad market.
2020-07 · regulation
UK CMA digital advertising report
The CMA concludes competition is not working in search and social advertising and calls for a new regulatory regime. Source
2020-12 · regulation
US states sue Google over ad tech
A Texas-led group of states files an antitrust suit targeting Google's ad tech business.
2021-04 · privacy, platform
Apple enforces App Tracking Transparency
With iOS 14.5, apps must ask permission before tracking users across other companies' apps and sites; most users decline. Source
2021-04 · deal
Ad tech IPO wave
AppLovin and DoubleVerify go public in April, followed by Integral Ad Science and Taboola by the end of June. Source
2021-05 · deal
Verizon sells Yahoo and AOL to Apollo
Apollo agrees to buy Verizon Media for $5 billion, ending the telecom's ad tech experiment. Source
2021-06 · regulation
France fines Google over ad tech
France's competition authority fines Google €220 million for favouring its own ad server and exchange, the first ad tech ruling against Google anywhere. Source
2021-06 · privacy, platform
Chrome delays cookie phase-out
Google pushes the end of third-party cookies to 2023, the first of several delays. Source
2021-06 · regulation
India's influencer ad rules
The Advertising Standards Council of India's guidelines requiring clear disclosure of paid influencer content take effect.
2021-11 · privacy, regulation
China's PIPL takes effect
China's Personal Information Protection Law sets consent rules for personal data, including for personalised advertising. Source
2021-11 · fraud
Methbot/3ve ringleader sentenced
Aleksandr Zhukov is sentenced to 10 years in US prison for running the Methbot scheme. Source
2022 · standard
OpenRTB 2.6 adds CTV features
IAB Tech Lab releases OpenRTB 2.6 with support for ad pods and other streaming-TV needs. Source
2022-01 · privacy, platform
Topics replaces FLoC
Google drops its FLoC proposal and introduces the Topics API for interest-based ads in Chrome. Source
2022-04 · privacy, regulation
Japan's amended privacy law
Amendments to Japan's Act on the Protection of Personal Information take effect, tightening rules on sharing data such as cookies with third parties.
2022-07 · privacy, platform
Chrome delays cookie phase-out again
Google moves its target for ending third-party cookies to the second half of 2024.
2022-10 · deal, platform
Elon Musk buys Twitter
Musk completes a $44 billion take-private; many large advertisers pause spending over brand-safety concerns. Source
2022-11 · platform, first
Netflix launches an ad tier
Netflix introduces "Basic with Ads" in 12 countries, a turning point for ad-supported streaming. Source
2022-11 · regulation, privacy
EU's DSA and DMA enter into force
The Digital Services Act and Digital Markets Act become law, with ad transparency rules and gatekeeper obligations phased in over 2023–2024. Source
2023-01 · regulation
DOJ sues Google over ad tech
The US Justice Department and several states sue to break up Google's ad tech business. Source
2023-01 · fraud
VASTFLUX shut down
HUMAN reports disrupting a scheme that stacked invisible video players inside in-app ads, at up to 12 billion bid requests a day. Source
2023-05 · privacy, standard
TCF v2.2 launches
IAB Europe removes legitimate interest as a basis for ad personalisation in its consent framework. Source
2023-06 · regulation
EU objects to Google's ad tech
The European Commission says Google distorted ad tech competition and suggests only a divestment may fix it. Source
2023-06 · deal
MediaMath collapses
One of the first DSPs goes offline and files for bankruptcy, leaving supply partners unpaid. Source
2023-08 · privacy, regulation
India passes the DPDP Act
Parliament enacts the Digital Personal Data Protection Act on August 11, 2023, India's first comprehensive data protection law. Source
2023-10 · fraud
BADBOX and PEACHPIT
HUMAN exposes off-brand Android devices sold with backdoors and an app-based ad fraud botnet running on them. Source
2023-12 · standard
ANA programmatic transparency study
The ANA estimates only about 36 cents of each dollar entering a DSP reaches consumers through quality impressions, and flags made-for-advertising sites. Source
2024-01 · privacy, platform
Chrome restricts cookies for 1% of users
Google turns off third-party cookies for a small test group in Chrome.
2024-01 · platform
Prime Video turns on ads by default
Amazon starts showing ads on Prime Video in the US unless members pay extra, creating a large new CTV ad supply overnight. Source
2024-03 · regulation, privacy
DMA obligations apply
Gatekeepers including Alphabet, Meta and Amazon must comply with the Digital Markets Act, including consent for combining data for ads. Source
2024-07 · privacy, platform
Google abandons cookie deprecation
Google says it will not remove third-party cookies from Chrome and will instead offer users a choice. Source
2024-09 · regulation
Google ad tech trial begins
The DOJ's case against Google's ad tech business goes to trial in Virginia. Source
2024-09 · deal, privacy
Oracle exits advertising
Oracle switches off its ad business, including Moat and the BlueKai data platform. Source
2024-11 · deal
JioStar is formed in India
Reliance and Disney combine their Indian TV and streaming businesses into JioStar, valued at about $8.5 billion. Source
2024-12 · deal
Omnicom agrees to buy IPG
Omnicom announces an all-stock deal for Interpublic, creating the world's largest agency group when it closes in November 2025. Source
2024-12 · fraud, regulation
Germany disrupts BADBOX
Germany's BSI sinkholes servers controlling at least 30,000 infected devices in the country. Source
2025-03 · fraud
BADBOX 2.0 disclosed
HUMAN, Google and partners disrupt a fraud and proxy network of about a million backdoored Android devices. Source
2025-04 · regulation
Court rules Google monopolised ad tech
A US federal judge finds Google illegally monopolised publisher ad servers and ad exchanges and unlawfully tied them together. Source
2025-06 · fraud, regulation
FBI warns about BADBOX 2.0
The FBI issues a public warning about infected streaming boxes and other devices used for residential proxies and ad fraud. Source
2025-07 · fraud
Google sues BADBOX 2.0 operators
Google files suit in New York against 25 unnamed operators and wins a preliminary injunction to dismantle their infrastructure. Source
2025-09 · regulation
EU fines Google €2.95 billion over ad tech
The European Commission fines Google for self-preferencing in display ad tech and orders it to end conflicts of interest. Source
2025-10 · privacy, platform
Privacy Sandbox ad APIs retired
Google retires Topics, Protected Audience, Attribution Reporting and other Privacy Sandbox APIs, keeping a few such as CHIPS and Private State Tokens. Source
2025-11 · privacy, regulation
India notifies the DPDP Rules
India notifies the Digital Personal Data Protection Rules, 2025, putting the 2023 Act into operation with a phased compliance timeline. Source
2026-01 · platform, first
OpenAI announces ads in ChatGPT
OpenAI says it will begin testing clearly labelled ads for adult users of ChatGPT's free and low-cost tiers in the US, a milestone for ads in AI assistants. Source
2026-01 · fraud
Google disrupts IPIDEA proxy network
Google takes legal action against one of the largest residential proxy networks, which let fraudsters disguise traffic as ordinary households. Source
2026-02 · deal
Paramount agrees to buy Warner Bros. Discovery
Paramount Skydance outbids Netflix with a $31-a-share offer valuing WBD at about $111 billion including debt. Source
2026-05 · deal
Publicis agrees to buy LiveRamp
Publicis Groupe agrees to acquire the identity and data-collaboration company for an enterprise value of about $2.2 billion. Source
2026-06 · deal
Fox agrees to buy Roku
Fox Corporation announces a $22 billion deal for the leading US streaming platform, expected to close in 2027. Source
2026-08 · deal
Nielsen agrees to buy DoubleVerify
Nielsen announces a $2.15 billion all-cash deal to combine audience measurement with ad verification and invalid-traffic detection. Source