The source of the message is a friend to verify how the message was added.

The friend verification message can add friends through mobile phone number, micro signal, QQ number, group chat, QR code, business card, etc.

Friend verification message refers to the verification request sent by the other party when adding friends. On social platforms such as WeChat and QQ, you can search for the other party and send it to Friend Request by inputting personal information such as the other party's mobile phone number, micro signal and QQ number. And you can join a common group chat, scan each other's QR code or add friends through their business card information. These methods can be used to send friend verification messages and add friends to each other.