Meta is facing a class action lawsuit after both Facebook and Instagram were found to be using an App Tracking Transparency workaround to track users on the web, even after they were denied permission to do so.
The company is accused not just of breaking Apple’s privacy rules, but also violating both state and federal laws …
App Tracking works by Apple assigning a unique identifier to your device. It doesn’t reveal any details about you, but does allow them to see (for example) that iOS user 30255BCE-4CDA-4F62-91DC-4758FDFF8512 has visited gadget websites, and therefore would be a good target for gadget ads.
It also allows them to see that iOS user 30255BCE-4CDA-4F62-91DC-4758FDFF8512 was shown an ad for a particular product on a particular website, then subsequently went to a particular retailer site to buy it – therefore that ad was (likely) successful.
With App Tracking Transparency, app developers must ask you if you want to allow that tracking. If you say no (as most people do), then the apps are not allowed to use that system.