Moderators are members with the SMP who have the ability to punish those who break the rules. They can join the server at any time and it is required that atleast one moderator is online for a lower-tier player to join.
They have permission to anonymously spectate players to look out for those breaking the rules, but are not allowed to use anything they see while spectating to their advantage, including discussing it with others, unless it is related to rule-breaking. If there is griefing, they also have access to CoreProtect to rollback the changes part of the griefing. Finally, they are able to view WAC alerts to assist them in catching cheaters.