What Should be the Role of a Moderator

I see a lot of Boddunan members voicing concerns to remove inactive moderators and requesting Maverick to hire new and active moderators, but what I would like to discuss is what should be the role and scope of the moderator.

Moderator isn't a person who just moderates a forum, he/she also takes care of many things and basically is responsible for keeping the forum clean, neat and quality.

I am a moderator/editor for a freelancing site too but before offering any inputs I would like to know what you all think (The site I work with has different work ethics and business model so not all advice would be relevant).

So members, start sharing your thoughts and opinions and let us know what you think should come under the scope of moderator and what you expect from your moderator.