A group consists of two or more individuals who have some shared sense of identity and interact with one another. Groups can be formal or informal. Formal groups are intentionally organized within an organization to accomplish specific tasks or goals, while informal groups emerge spontaneously as people interact over time. Key aspects of groups include interaction among members, shared goals, and members seeing themselves as part of the group. Group dynamics and norms influence member behavior. Cohesiveness, or the degree of attraction between members, also impacts group functioning.