The hidden tricks of non-verbal communication

Appealing to a client's emotional perception is at least as important as rational argumentation. The impression a salesperson gives off to others and the way clients feel when they talk to him / her are essential to the success of a deal. This is why it is no surprise that non-verbal signals (body language, gestures and intonation) play a crucial role in business communication. Do you know how to use non-verbal communication to your advantage?