Body language is the science of nonverbal signals such as gestures, facial expressions, and eye gaze that communicate a person’s emotions and intentions. Unlike words, body language is often done subconsciously and constitutes a large part of our communication.We use body language whenever we communicate face to face.Using positive body language can help us get what we want if we know how to use it. It can land us a job, help us sell our house, win an argument, or start a relationship. Negative body language, on the other hand, can keep us from getting the things we want. What's more, it can cause us to lose friends, miss out on opportunities at work, or offend people we want to impress. So it is a powerful tool of communication and usually reliable to reveal our true feelings.There are three body language signs that if we use these upon meeting people - it will become much more likely that we will befriend them.