This page is a placeholder for the RS Discuss forum system. Once activated, the forum will take the place of this text. The title of this page will still show by default unless you construct a custom page template (this is outside the realms of the RS Discuss plugin).
Is your forum active but you are still seeing this message? Check your settings under Forum › Configuration. The "forum page slug" should be set to the same name you see listed under "Post slug" when you edit this page.