<TT> (TeleType) mimics the typewriter in the way that all the text within this tag is the same size and width. For example, if you has a "m" and an "I" next to each other, they would occupy the same space. Sometimes in your life you probable have seen the difference in width between the letter "I" and the letter "W" while in most cases this tag is useless but sometimes you might want to make a document or poem a perfect shape.
