They are here to help us navigate the site. They answer questions about ask, and questions in general. They keep spammers from polluting our site. They block mean trolls and laugh at silly good hearted ones. They listen to us gripe. They guide us to the "powers that be." They enforce the guidelines that others impose. They take our grief when we blame them for writing the guidelines that they did not write. They do much more of which we are unaware. They do all their tasks with courtesy and more patience than most could ever muster. They are probably underpaid.