Discussion boards provide a forum for conversing about topics that interest your team. For example, you could create a discussion board for team members to suggest activities.
Each discussion board appears on a page that includes buttons for starting new discussions, sorting and filtering discussions, switching to a different view of the discussion board, and changing the design of the discussion board. You can create alerts so that you are notified of changes to the discussion board.
You can view discussion comments in either flat or threaded view. Flat view displays all comments in the order in which they were created. Threaded view lets you view comments by conversation. All messages that are part of the same conversation thread appear together in the order in which they were created.
By default, your site comes with a built-in discussion board named General Discussion, which is listed on the Quick Launch bar as well as on the Documents and Lists page.
Note The features on your site may vary based on the template your site uses.