This document discusses online forums, including their definition, history, structure, characteristics, benefits, and educational uses. An online forum is defined as a message board or discussion group where people can hold conversations through posted messages. Forums originated from bulletin board systems and are structured with subforums and threads of posted messages. They aim to establish open environments for learner-centered discussion and encourage feedback, sharing, and knowledge building among participants. Benefits include intellectual and social engagement as well as keeping up with current events. Teachers can create educational forums for students to participate in discussions, even when not in class.