You can use roles to assign permissions to members of your Google Group. There are three default roles in Google Groups.
The owner role has the highest level of permissions and can do the following:
The number of owners in a group should be kept to a minimum as they have the greatest control over the group.
The manager role can do the following:
Everyone in a group has the member role by default and can do the following:
Permissions given to the Members role are automatically applied to all other roles.
Group owners can view all permissions and change roles for individual members using the following steps: