In sociology, a group is defined as any number of people with similar norms, values, and expectations who interact with one another on a regular basis, developing a sense of shared identity and belonging. The size of a group can range from a small dyad (two people) to large-scale organisations or even broader social categories. What distinguishes a group from a mere collection of individuals is the presence of ongoing social interaction, shared norms and values that guide behaviour, and a sense of mutual awareness and interdependence among members. Groups play a fundamental role in social life, providing individuals with social support, a sense of identity, and a context for social interaction and the development of social norms. Sociologists study groups to understand group dynamics, social influence, conformity, leadership, and the ways in which groups shape individual behaviour and social structures.