The administrators (short form: "admin") manage the technical details required for running the site. As such, they may promote (and demote) members to moderators, manage the rules, create sections and sub-sections, as well as perform any database operations (database backup etc). Administrators often also act as moderators. Administrators may also make forum-wide announcements, or change the appearance (known as the skin) of a forum. The term prune used extensively in administration panels is synonymous with delete or remove. The term comes from pruning, the practice of removing diseased, non-productive, or otherwise unwanted portions from a plant.