Body language refers to nonverbal signals transmitted through facial expressions, posture, gestures, eye contact, touch, and spatial positioning—channels through which humans continuously communicate meaning beyond words. Rooted in evolutionary biology and deeply shaped by culture, nonverbal communication comprises an estimated 55-65% of interpersonal meaning exchange, operating largely through unconscious processes that reveal genuine emotions, intentions, and social dynamics. Mastering body language reading requires understanding baseline behavior—a person's normal nonverbal patterns—and detecting meaningful deviations, alongside recognizing that no single gesture carries universal meaning; interpretation demands attention to contextual clusters and congruence between verbal and nonverbal channels.

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