Usually, "CC" or "CCC" in chats have no special meaning or implication. This usually refers to "CC" or "Bcc" in emails or other communication tools. Function. When you choose to use "CC" or "CCC", you will be able to send a message to multiple people at the same time in a private chat. After receiving the message, these people can view the information in their chat history, but other People won't see it. In addition to this meaning, "CC" can also stand for Carbon Copy, which means simulating an alternative method that is equivalent to the real cost, while "CCC" can stand for China Compulsory Certificate, which means it is in compliance with the national Mandatory certification requirements.