Body language plays an important role in communication by expressing one's emotions, feelings, and attitudes beyond words. It is an innate and learned system of nonverbal cues, including facial expressions, gestures, and body positions. While some signals like smiling are universal, others vary culturally. Being aware of inconsistencies between speech and body language can provide insight into what people are truly thinking or feeling in a situation. Regular practice observing body language can improve one's ability to perceive these nonverbal signals.