Forum is used to let the visitors express their opinion. The comments in the forum are organized in different threads. The forum can be moderated. When you click on Show thread, you can see the replies for that subject.
Here you can give a reply by clicking the link Reply to the right. If clicking Add new thread, the following page will show:
Here you can add title, description, and the first message for the new thread.
OBSERVE! The Forum inherits permission rights from the web site. If you would like to edit the permission rights you right click on the folder or a forum and choose Properties. Beneath Security you can uncheck the inheritance from web site or add new rights.