A discussion forum is an online platform where individuals can engage in conversations about various topics. Users can post questions, share opinions, and respond to others, creating a space for dialogue and exchange of ideas. These forums can cover a wide range of subjects, from technology to hobbies, and often have categories to help organize discussions. Participants in a discussion forum can remain anonymous or create profiles to build a reputation within the community. Popular examples of discussion forums include Reddit and Stack Exchange, where users can upvote helpful responses and contribute to ongoing discussions.