Face-to-face interactions is a fundamental mode of human communication and social exchange occurring between individuals who are physically co-present in the same location. As an academic concept and research focus, it investigates the complex dynamics of direct, embodied communication, encompassing verbal content, paralinguistic features, non-verbal cues (such as gestures, facial expressions, and posture), spatial relationships, and immediate feedback mechanisms. Characterized by mutual physical presence, multi-sensory engagement, and synchronous information flow, its significance lies in its foundational role in shaping social relationships, facilitating collaborative activities, transmitting cultural norms, and influencing individual and group behavior across diverse social contexts.