Have you ever noticed how much you are saying to people even after you are not speaking? Unless you are a master at impersonating, you are constantly sending messages regarding your actual thoughts and feelings whether you are using words or not. Therefore, you should be careful about your body language in communication and follow other body languages also.
Reading people’s body language is not rocket science. According to Wikipedia, ‘Body language is a type of non-verbal communication in which physical behaviours, as opposed to words, are used to express or convey the information’. The signal people send while talking to other people could be intentional or unintentional, also might be positive or negative.