Users SuperUser Role

Users SuperUser Role

What is the purpose of the SuperUser role from Users eSpace?
I only knew the UserManager role, and I recently found this "new" (?) role from Users.

Checking the help they also only mention the UserManager:
SuperUser role is a role given to users who should receive all roles.

Previously this was only the admin user, or the UserManager role, but it was decided to separate the concerns.

One thing is being a super user, another is being able to manage users.
Thanks :)

What is double check role can anybody explain me