What is a Moderate comment?

Comment moderation is a process where, when visitors comment on posts, the comment is not published directly until and unless it is approved by the admin to be posted. It manages your comments so that there is no comment spamming.On the comments page you will see four different tabs (all comments, pending, approved, spam and trash). Comments that need your approval will appear under the Pending tab.To approve a comment take your mouse over to the comment, and you will see action links appear below the comment. Click on Approve to make a comment publicly visible on your website. You can also reply to a comment by clicking on the reply link. Replying to a comment automatically approves the comment as well.
If you see a comment that looks or feel spammy, then you can mark it as Spam.