A group is a collection of individuals who come together for a common purpose or interest. Groups can vary in size and structure, ranging from small teams working on a project to large organizations like nonprofits or corporations. The dynamics within a group can significantly influence its effectiveness and the satisfaction of its members. Groups often provide a sense of belonging and support, allowing individuals to share ideas and collaborate. They can be formal, such as business teams, or informal, like friend circles. Understanding group behavior is essential in fields like psychology and sociology, as it helps to improve communication and teamwork.