Roles explained

Access within a collection is controlled by roles. Each member has one role, which determines what they can view and change. Roles are ordered from least to most privileged:

RoleCan do
ViewerView works, scores, and programs.
MemberEverything a viewer can, plus basic participation.
EditorCreate and edit works, scores, and programs.
AdminManage members and collection settings.
OwnerFull control, including billing and deletion.
Higher roles include all the permissions of the roles below them. For example, an admin can do everything an editor can.

To change someone's role, see Manage permissions.