Learn how to read and understand body language with key signs, types, and tips for improving nonverbal communication in daily interactions. Body language is a type of nonverbal communication that uses physical behaviors to express or convey information. Learn about facial expressions, head and neck postures, body postures, gestures, eye movement, touch and space in body language . The body language explain what a person is feeling. Body language of boredom, interest, insecurity, etc. consist of head and body movements.