What is the advantage of "Body language" in communication?

Introduction
Communication which includes body movements, such as gestures, facial expressions, eye movements, and postures is known as body language, it is a very personal way of expressing yourself without words. One's body language can carry a whole conversation without even saying a word. Sign language is an excellent example of this, another example would be when you talk with people nervously, you may continually shake your hands. If people pay attention to your hand, they may understand your body language.
One can spend their whole life communicating only with there body. Still one…