You’ve probably downloaded an app, given it permissions, and forgotten about it more times than you might realize. Even if when you gave it permissions it was a benevolent and useful app, there’s no guarantee that a year or two down the line it hasn’t been bought out or turned into a data mining snoop.
Google Play Protect will now revoke privacy invading permissions on unused apps for you to prevent that Chubba Chubba Woo Yeah! game you downloaded back in 2019 from listening in on your conversations and selling any data it can collect off of your devices’ sensors.
You can choose which apps always have access and permissions even if unused (such as Dropbox, I don’t access it on a regular basis but I want my photos instantly backed up in the event I’m documenting something where my phone could be confiscated / removed).
The email Google sent said you could see it in action over here, but there doesn’t seem to be a whole lot of non-animated content involving how to configure, where to locate instructions, etc. My guess is you’ll know it when you see it.
Unless I’m getting things mixed up, Samsung has had a similar permission revoking scheme for a while.
Source is an email