Set the classes to which a new member of the site is assigned initially. If you have verification enabled, this assignment may take place either when the user signs up, or when the user is verified.
And remember that if you are using hierarchical user classes, a user is automatically a member of all classes 'above' each selected class in the tree.
And remember that if you are using hierarchical user classes, a user is automatically a member of all classes 'above' each selected class in the tree.