An online discussion group, also known as a USENET (6 letters), is an online platform where people can communicate with each other in real-time. It is a type of virtual community where users can post messages, share ideas, and discuss topics of interest. The discussion group can be moderated or unmoderated, depending on the purpose of the group. USENET is one of the oldest online discussion groups, having been established in 1979. It is still widely used today for discussions on a variety of topics.