Chat and group chat     
Instant Messaging (IM) or chat allows you to communicate with  other users with text messages. In many cases, chat may be useful for  communicating with other users instead of, or in addition to, voice  communication. For example, if you are discussing a website you visited  recently, it may be easier to copy and paste a website address into the  chat window instead of trying to spell this out during a call.
 
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