You must manually approve posts and threads in topics that require approval. Once you approve a post or thread, it is visible to all users. To hide the post or thread, you must unapprove it.
On the navbar, click Discussions.
Do any of the following:
Beside the post you want to approve, click the Approve Post link.
From the context menu of the post you want to approve, click Approve Post.
To approve all posts in a thread, click Approve All Replies in Thread.
From the context menu of the post you want to unapprove, click Unapprove Post.
From the context menu of the thread you want to unapprove, click Unapprove Thread.