Someone told me that once though... and anyway I meant some of the groups.
Regardless, it doesn't really answer the question. I get that you're trying to be helpful, but vague or misleading answers just cause confusion. So let me try and amend this and actually answer the question:
Administrator is self-explanatory.
Gensokyo PD are mods.
Acolytes are in charge of a particular board, and serve to bring the voice of the users of that board to the staff.
Shrine Janitors deal with menial tasks like merging topics, approving posts, making edits when needed and so on.
Librarians mod PSL.
Resident Artist are noteworthy contributors to AAA.
Atelier Idol, Wordsmith, and Godmother are those who have gone above and beyond at AAA, PSL and RPG respectively.
Spechul Memba have gone above and beyond for the site as a whole.
Bunbunmaru Staff write up news.
The Idiots are a part of those competitions you see in the Colliseum.
That's pretty much it.