Group structure involves the emergence or regularities, norms, roles and relations that form within a group over time. Roles involve the expected performance and conduct of people within the group depending on their status or position within the group. Norms are the ideas adopted by the group pertaining to acceptable and unacceptable conduct by members. Group structure is a very important part of a group. If people fail to meet their expectations within to groups, and fulfil their roles, they may not accept the group, or be accepted by other group members.