The Role Groups section is where you can create groups and assign roles to them. Adding users to these groups provides a more efficient way to manage roles for multiple users.
To open the Role Groups view, navigate to System ➔ Role Groups.
Users
The Users section lists represents everyone with login access. You can edit user details like business unit and organization, and manage roles for specific access and permissions.
User impersonation
The User impersonation allows for user to be able to impersonate (use the same privileges) as another user. This will not happen immediately when the row is added, but used in some other contexts such as workflow elevation or REST API.