This is a selective timeline of Google and Meta products, not a claim to cover the whole history of advertising. Each milestone introduces a question you can still ask about an ad today: did it match this search, this page, previous activity, or an advertiser’s audience?
2000
A search becomes an advertising signal
Google launched its self-service AdWords program on October 23, 2000. Advertisers could place text advertising associated with search keywords.
Source: Google’s original AdWords announcement.
What this helps you understand
The useful distinction for a reader: a relevant ad can respond to what you are asking right now. Relevance does not always require a long history about you. A fictional search for ‘repair a zipper’ already suggests a situation that a repair business might want to reach.
2003
The page itself helps select the ad
On June 18, 2003, Google announced a self-service option for AdSense, building on its content-targeting service. The announcement described advertisements matched to the content of publishers’ individual pages.
Source: Google’s self-service AdSense announcement.
What this helps you understand
This gives us a second explanation to consider: context. An ad beside a recipe can relate to the recipe. It also separates the place where you read from the system supplying the ad—a distinction that still matters when you look for the right privacy controls.
2014
An explanation becomes part of the ad
Facebook introduced Why am I seeing this ad? in 2014, according to its later account of the tool’s development. Its purpose was to give people context about factors such as demographics, interests, and website visits.
Source: Facebook’s history of its explanation tool.
What this helps you understand
A disclosure is a better starting point than guessing from an image. It creates an important habit: read what the platform says it used, then decide what you want to change. An explanation still needs to be read within its limits; it is not access to the full decision system.
2019
Advertiser relationships become more visible
Facebook announced more detail about ad targeting and businesses that upload or share customer lists. These disclosures helped distinguish a business relationship from an inferred interest.
Source: Facebook’s 2019 ad-transparency update.
What this helps you understand
A recurring shop ad may connect to a customer relationship, not only a recent browser visit. That does not confirm the source of any individual ad. It gives you a more useful question to ask of its disclosure: did the platform mention a list, a visit, an interest, or none of these?
2022
Google brings preferences into My Ad Center
Google began rolling out My Ad Center on October 20, 2022, with controls for advertising topics, brands, personalization, and information used for ads across its services.
Source: Google’s My Ad Center launch.
What this helps you understand
This makes a useful separation more visible: choosing the kinds of ads you prefer is different from choosing whether saved activity is used for advertising. A preference for fewer travel ads and a decision to turn personalization off should be assessed against their different purposes.
2026
Transparency menus and data controls keep changing
Meta announced an About this ad destination in June 2026. It also announced an expanded Activity from other businesses control and the retirement of Your activity off Meta technologies, with changes rolling out by country.
Source: Meta’s 2026 activity-controls update; Meta’s About this ad announcement.
What this helps you understand
Old screenshots are not permanent instructions. When a label changes, read the current control’s description and check what information it governs. A renamed or expanded preference is a reason to review its scope rather than assume it does exactly what the previous menu did.
Older methods did not simply disappear.
A current search, page context, and information about an audience remain different possibilities to consider. The timeline explains where these ideas fit; the actual ad’s disclosure is where your own investigation should begin.
Understand an adSources and editorial notes
Original product announcements are linked at each milestone. They document what the companies announced, rather than independently establishing how every ad was delivered. The consumer examples and practical interpretations are AdCheckMe’s explanatory work.
Sources checked October 12, 2026. AI-assisted writing and source research; human editorial review has not yet been recorded. Read our editorial approach or send a correction.