Body language refers to nonverbal communication signals like facial expressions and gestures. Experts estimate that 60-65% of communication is nonverbal. It is important to understand body language cues, but also consider other signals like context. Nonverbal communication can repeat, contradict, substitute for, or accent verbal messages. Types of body language include facial expressions, eye contact, mouth movements, posture, gestures, use of personal space, touch, and vocal tones/qualities. Interpreting these cues can provide insight into emotions, attitudes, and the truthfulness of messages.