What does the "Users can add gallery apps to their Access Panel" setting mean?

HI VasilMichev,

Thanks for your patience. But I still don't get it. How can a user add an app to his Acces Panel without an admin having to pre-integrate the app? For me, pre-integration means that the app has to be assigned to a user

and has to be made visible to the user

Or does it all have something to do with the self-service functionality?