Manage the individuals who can access your environment by defining them as users in the system. Create user groups and assign users to them. Use roles to specify what different users and user groups can see and do.
A group is a set of users who share a common purpose. Members of groups perform tasks such as approving change requests, resolving incidents, receiving email notifications, or performing change request tasks. Assign every user to at least one group.
A good practice is to assign roles to groups rather than to users. Administrators can assign roles quickly to multiple users by adding the users to the group. If a user moves to another group, the role assigned to the new group is applied automatically.