This document defines group dynamics and discusses the formation and types of groups. It states that group dynamics is the study of forces operating within a group and the interaction between group members. Groups are formed for different reasons, including a sense of security, status, and goal achievement. The document outlines various theories of group formation and discusses the stages of group development from forming to adjourning. It also classifies groups into formal/informal, primary/secondary, and discusses reasons for group dynamics and functions of groups.