1. Navigate to Setup > General > Users.
2. In the Users window, click the Groups tab at the top and then click Create Group button.
3. Specify the Group Name and the Description of the group in the Create Group pop-up. Then click Next.
4. In the Add members to Group screen, select the group members. From the dropdown box, you can select users, roles, and different groups as members of the new group.
- Users: Only selected users can become members of the group.
- Roles: All users associated with selected roles and their subordinate roles can become members of the group.
- Groups: All users belonging to a particular group can become members of the new group.
5. If grouping by roles, select the specific roles to be added, then click the option to include their subordinates in the group if desired.
On the top right of the pop-up, you will get a count of Users, Roles and Groups based on your selection for the particular group.
Clicking on the Selected Hyperlink (link in the red box shown in the picture above) will show the selected Users, Roles and Groups on the pop-up for Selected Members.
6. Once all Members have been added to the group, click Save.