This feature allows you to ignore the posts a particular user makes on the board. If you choose to ignore another user, that user's posts will appear, but the actual text of the post will be replaced with, "Ignoring this User. Stop ignoring this user". You can click on "Stop Ignoring This User" to resume viewing of the user's post.
If you ignore a user, they will not know that you are ignoring them.
When an ignored user posts a new topic on the Message Board, you will see the words "Ignoring Topic" in the message listing. If you click on "Ignoring Topic" you will see the topic title, date and the name of the user who created the topic, along with any replies to the topic.