Why is my Android activity showing up on myactivity.google.com?
On your phone, navigate to Settings &gt; Google (or Accounts and select Google account). Then click Google Account &gt; Data &amp; Personalization.

Under Activity Controls section you can review and turn on/off many of these tracking features. BTW, you consented to this when you skimped over the ToS Agreement and just clicked "next, next" when setting up your phone.

Each section explains what it saves/tracks.


Web &amp; App Activity is specific to Google Apps and Websites (maps, search, account, etc). It also includes 3rd party Apps you use on Google's OS (i.e. Android). It also includes history (i.e. Chrome History) of these apps. Thankfully, the latter can be separately disabled.
Device Information is more for preinstalled Android apps, like Phone and Contacts, voice searches, etc.


Oh and it has been going on for years.
The only "recentish" change is that logging into 1 Google Service (for example, Maps) also logs you automatically into other Google Services (like YouTube, Gmail, etc)