Purpose of Moderator group?

[bc3tech]

I am just wondering what the purpose behind the Moderator group is in vBulletin. I recently made one user a Super mod, and one user a Mod. My thinking here was that the Moderator would be able to monitor (delete, move, etc) threads in forums I specify, while the Super mod would have full-reign.

Clearly this isn't the case. The moderator group doesn't have permissions to even delete threads / posts, and i don't see this option anywhere in the configuration for a usergroup or forum.

Any guidance on the thinking behind this would be much appreciated, as well as some input on how i can specify that a usergroup is able to delete / move / edit posts w/in only certain forums.

I understand the concept of adding a user to be moderator of a forum (and have already done that in some cases) but am failing to see the purpose of the Moderator user group.

thanks