The comments tab of the contest will show all comments that have been submitted. If comment moderation is turned on the comments tab will show comments that have yet to be published and are awaiting moderation.
To moderate comments select the moderation comments button to select which comments to approve and reject.
If comment moderation is turned off in the settings area all comments will be published instantly. The latest comments will still appear in the Comment area with a status of published. This gives administrators the ability to still reject comments after they have been submitted.