The document discusses various types of body language signals and their meanings, including aggressive, bored, closed, deceptive, defensive, emotional, evaluating, open, powerful, relaxed, and submissive body language. Some key signals described are crossed arms (closed), eye contact and relaxed posture (open), handshakes and touching (powerful), and closed and small body positions with submissive gestures (submissive). The document provides examples of specific facial expressions, physical positions, and motions that commonly indicate each type of body language.