Create a Local Group
Local groups are created using the Tableau Server internal user management system. After you create a group you can add and remove users, as well as set a minimum site role to grant to users in the group when they sign in.
In a site, click Groups, and then click Local Group.
Type a name for the group.
To set a minimum site role for the group, select Grant site role on sign in and select a minimum site role from the drop-down list.