Using Custom User Groups
There are several primary uses of the custom user groups. The most helpful is through the ability to share views you may have made with users on their mobile apps. The applicability is that you can create a view and be the owner of the view, then enable a group of users to view this on the mobile app - thereby ensuring each sees what you want them to see as well as relieving each user from having to create their own view or copy yours. In this way, managers and management can construct in-depth custom views and share them easily with explicit groups of users.
To learn more about how to do this read the following about views:
Editing User Groups
You can edit a user group by clicking on the notepad next to the user group name. The current list of customer IDs will be shown. The easiest way to add a user is via the lookup feature. Simply enter a first or last name and the autocomplete will give you the matches. Select one and hit Add. Repeat to add more users. When you're done, hit the update button.