Working in groups is a key activity for people in most personal and professional settings. There are many different types of group which can be broadly divided into two categories, depending on whether the task or the experience of the group is the central concern.

Groups are dynamic in both structure and process. Usually group cohesiveness and group norms develop to enable the group to achieve more than individuals would be able to on their own.

The aim of a group is usually to bring about some change, support or insight into either the individual, the group, or the environment.  Whilst groups may well encounter internal problems and conflict at certain stages, when they are working effectively groups provide a positive, supportive environment in which to develop and learn new interpersonal skills.