Google to Prevent App Developers from Using Advertising ID for Any Purpose Following User Opt-Out
On June 3, 2021, Google informed app developers that beginning in late 2021, when Android 12 OS users opt out of personalized ads, the advertising ID provided by Google Play services will not be made available to app developers for any purpose.
According to the announcement, in July 2021, Google will provide an alternative solution to the GAID to support essential use cases, such as analytics and fraud prevention. These change will expand beyond users of Android 12 OS in early 2022, to apply to all devices that support Google Play.
Source: Google to Prevent App Developers from Using Advertising ID for Any Purpose Following User Opt-Out | Privacy & Information Security Law Blog