What is a group? 

A social group is simply a number of people who interact with each other on a regular basis. It establishes social relationships among social beings. Groups are units of society, having all characteristics of the society, except for the fact that groups are concrete entities. We live in groups such as family; we belong to groups like lineage and clan and the like. Therefore, sociologists have also described sociology as a science of social groups. Persons in all societies, in fact are always involved in several forms of interaction (having meaning and purpose). These interactions appear in collectivity as well as these interactions take place between persons having collectivity linked identity. These identities play an important role in forming social groups.