Awesome! Now you're an admin. Welcome to the team!
So basically our role is to introduce new members to the wiki. Whenever a user joins they will receive an automated message, as we all did when we joined, which comes from one of the active admins. Occasionally these users may message you back asking questions about editing, so I guess helping new users around is one of the main things we do.
Also, making sure all content and comments are both correct and non-offensive so I suppose that comes under wiki housekeeping duties. You also have the authority to delete pages that individuals may accidentally create as a blog-post.
I think those are our main duties but if I think of anything else I'll let you know! :)