Online chat is an interpreter between two or more people; it's providing communication through the internet and SMS from sender to receiver. Chat messages are generally short in order to enable other participants to respond quickly. Online chat may address point-to-point communications as well as multicast communications from one sender to many receivers. Online chat provides a facility one-on-one chat or one-to-many group chat using tools such as instant messengers, The expression online chat comes from the word chat which means "informal conversation". Online chat includes web-based applications that allow communication – often directly addressed, but anonymous between users in a multi-user environment. Web conferencing is a more specific online service that is often sold as a service, hosted on a web server controlled by the vendor.