This is mainly for the backend section to make it easier for admins to organize and manage them a lot easier and faster.
Clone other forums and groups(with permissions)- This will make it a lot faster to build forums if you have a lot rather than one by one.
Collapse groups and forums- if you got a lot of forums and subforums it would nice to be able to collapse them in the backend.
Imagesets-Create imagesets that way you can use one image set for all your forums and change specific ones out that you need to. Makes it a lot easier than setting each forum and group one by one.
Not sure if any of these are actually implemented or not but couldnt find anyways to do them.