Nonverbal communication is considered one of the most important components of interpersonal interaction and social communication. In modern pedagogy, psychology, linguistics, and communication studies, nonverbal communication is analyzed as a system of gestures, facial expressions, body movements, eye contact, intonation, spatial behavior, and other non-linguistic signals that convey emotional and social meaning. This article examines the theoretical foundations of the concept of nonverbal communication and its significance in human interaction. Through qualitative analysis of scientific literature, the study explores major theoretical approaches, classifications, and communicative functions of nonverbal communication. Particular attention is given to kinesics, proxemics, paralinguistics, visual communication, and emotional interaction as essential components of communicative behavior. The findings indicate that nonverbal communication significantly influences interpersonal understanding, emotional expression, and social relationships. The article concludes that the study of nonverbal communication provides important theoretical and methodological foundations for pedagogy, psychology, and communication-oriented professional education.