What is an AutoModerator?
An AutoModerator is a bot designed to automate various moderation tasks that require little or no human judgement. It can watch the new/spam/comments/report queues of any subreddit it moderates and take actions on submissions and comments based on defined conditions. This includes approving or removing them . . . . It is effectively fairly similar to reddit’s built-in spam-filter, but [also] allows for conditions to be defined specifically instead of just giving vague hints by removing/approving. Its decisions can always be overridden by human mod[erators], exactly like an existing filter.