Forum posting is an off page SEO technique. It involves generating quality backlinks by participating in online discussion forums of forum websites. In a forum posting, you can post a new thread as well as reply to old threads in forums to get quality backlinks to your site. Some of the popular forum websites are message boards, discussion groups, discussion forums, bulletin boards and more. So, forum websites are online discussion sites that allow you to participate in online discussion and interact with new users to promote your websites, web pages and more.