Collective behavior refers to the actions and reactions of a group of individuals in response to a shared situation or event. This phenomenon often occurs in crowds, social movements, or during emergencies, where people may act in ways that differ from their usual behavior. Examples include riots, protests, and mass gatherings, where individuals may feel a sense of unity or anonymity. The study of collective behavior helps researchers understand how social dynamics influence group actions. Factors such as social norms, emotions, and communication play significant roles in shaping these behaviors. Understanding collective behavior can provide insights into societal trends and the psychology of groups.