This document defines group dynamics and discusses its key concepts and principles. Group dynamics is defined as the study of how individuals interact within groups and the nature of groups. It refers to the power of groups to influence behavior and the study of group processes, motives, and characteristics. The document outlines two major goals of groups: to get things done and get along as a group. It also discusses principles of group dynamics, such as the conditions required for a collection of individuals to be considered a group, and differences between groups and teams.