A subforum is a special type of forum that appears under the main forum. They are mostly used for stories and roleplays, especially in a very large one, such as the Ninjago Forum. There have also been some sub-subforums - subforums inside of a subforum - in the past, but there are currently none. New subforums are constantly being added as roleplays grow and new forums come in. Subforums supposedly speed up moderation.