Once you have assigned users to your groups, use them on different actions on your Enterprise space. It will help you to speed up same actions that you need to do on more than one user. For example: you have several folders and wish to share the same folders with the same group, select the collaborators option inside the folder.
Select the Invite others and press the groups from my Enterprise option. You will have the list of groups, chose your group and the privilege that members will have on that folder. To invite the users press the button.
Check the groups tab and you will see the new group added and the privilege assigned. You can change the privileges anytime.