A message board is an online platform where users can post messages, share information, and engage in discussions on various topics. These boards often have different categories or threads, allowing users to find and contribute to conversations that interest them. They can be used for anything from hobbies to support groups, making them versatile spaces for communication. Users typically create accounts to participate, enabling them to post questions, respond to others, and share resources. Popular examples of message boards include Reddit and 4chan, which host a wide range of discussions. Message boards foster community interaction and can be a valuable source of information.