Discussion forums, sometimes called as message boards or bulletin boards, allow your users to participate in online conversations by posting responses. These conversations differ from chatrooms in that they are organized into subject-based threads and archived.

Drupal core includes a basic Forum module which allows you to create threaded discussions as Drupal nodes. You can extend the Forum module with additional contributed projects such as Advanced forum, or try to integrate Drupal with standalone forum software such as phpBB (open source) or vBulletin (commercial).