An online discussion is a type of communication that takes place over the internet, usually in the form of a chatroom or forum. It involves two or more people exchanging ideas and opinions on a particular topic. The term 'CHAT' is often used to refer to an online discussion, as it is a common way for people to communicate with each other in real-time. Online discussions can be used to discuss a variety of topics, from current events to personal experiences. They can also be used to share information, ask questions, and provide support.