Online chat can refer to any kind of communication over the Internet, but is primarily meant to refer to direct one-on-one chat or text-based group chat (formally also known as synchronous conferencing), using tools such as instant messaging for dating site, application - omputer programs, Internet Relay Chat, talkers and possibly MUDs, MUCKs, MUSHes and MOOes. The expression online chat comes from the word chat which means “informal conversation”.