You can use discussion forums so your visitors can participate in threaded discussions.
There are two kinds of forums for your site. Embeddable forums and Externally linked forums.
Embeddable forums are placed (or embedded), directly into your Cascade page and the forum will appear on your site. This gives the illusion of a seamless integration between site and forum.
Externally linked forums are forums you create that you link to and are not embedded in your site.
After creating your forum from the options below, copy the generated code into the 'HTML Source editor' view of your Cascade editor to place the discussion forum on your page.
After creating an external forum, all you have to do is create a link from your Cascade page to the externally created forum.