Creating and Managing User Groups in SharePoint

It is not necessary to create a user group to add members to a SharePoint site. To simply add members to a SharePoint site see Add People to a SharePoint Site .

Follow these guides if you have first reviewed Restrict SharePoint folders from certain Users and you have more than one group of users that you would like to hide folders from.

User Groups are required for folders that contain more than 100,000 items if you need to restrict access to the folder.