A user group is a combination of roles and users. If you want to change permissions for the user group, the changes are automatically applied to the users who are members of the group.
Managing User Groups
Access to functionality in Microsoft Dynamics NAV is managed by permissions that are grouped in permission sets. Permission sets are granular, and it can be difficult to get an overview of which users can access which parts of the application. To help you manage permissions in Microsoft Dynamics NAV for your company, you can set up one or more user groups, add permissions sets to the groups, and then add users to the groups. You can add more than one permission set to a user group.
In the User Groups window, you can set up user groups, add and remove permissions, and you can apply changes to all or specific user groups.