Here you can learn what happens with data related to you and any servers where you add my bot to.
This is mainly required for starboards to work as adding a message to the starboard channel requires me to read it’s content, author data, etc. If you don’t plan on using the feature you can safely disable this permission.
This is mainly dependant on what features you use. For example, no playlists data is saved if you don’t use the /playlist
command. Here’s some universally saved data: