ResourcesTimelines
Tracking and Privacy Timelines
Interactive timelines of the platform changes, rulings and research that shape marketing measurement, with sources for every entry.
The full timeline · 49 changesHow Ad Tracking Changed, 2012–2026Every major change to ad tracking since 2012, from Apple, Google, browsers and regulators: what changed, what it did to measurement, and the sources worth reading.Explore the Timeline
In Focus
17 changesHow Apple Changed TrackingEvery change Apple made to tracking on iPhone, in apps and in Safari, from the IDFA in 2012 to iOS 27's ad tech block list, and where measurement stands today.21 changesHow Google Changed TrackingEvery change Google made to tracking in Chrome and on Android, from the Advertising ID to the Privacy Sandbox, three delays, the reversal and the retirement.