This is a small overview of the different user groups available on WikiTemp.
Note that people can have multiple groups at the same time (not anonymous users).
For a full list of everything a group can do, see Special:UserGroupRights.
Not actually a group, but rather not having a group at all. Users without an account belong in this group. Their IP is publicly shown when they make edits on the wiki.
This is where all people with an account belong. Users have additional rights over people without an account, like leaving your IP private when editing, and the ability to change preferences.
Users will automatically land in this group after they have been here for a small amount of time and have made enough edits. This group allows you to edit semi-protected pages and perform certain other actions.
People with this group are staff members on the GBAtemp.net forums and have gotten some additional rights that lets them manage the wiki without needing Sysop rights.
Sysops (System operators, sometimes called Administrators) have some additional rights over normal users in order to keep the Wiki clean from spam/vandalism/... They can protect pages, delete pages, block users, ...
This group must be given to you by a bureaucrat.
Bureaucrats are able to edit other users' groups. They can promote registered users to Sysops, Bureaucrats, Bots and Checkusers.
This group must be given to you by (another) bureaucrat.
Check users are able to check the IPs of logged in users, as well as the user accounts that have used a certain IP. They are the only people with this ability. While any sysop is able to perform IP range blocks, only the checkuser rights would allow you to find a suitable IP range to block.
This group has to be given to you by a bureaucrat.
Bots are automated users who do predefined tasks on the wiki. Bot edits are hidden from the recent changes by default.
This group can be given to a bot by a bureaucrat if needed.