Setting Up Product Group Features
Adding product group features allows some newer order form templates to display features that relate to all the products within the group.
Navigate to Configuration > System Settings > Products/Services (Setup > Products/Services > Products/Services in WHMCS 7.10 and earlier).
Click the Edit icon next to the product group you wish to edit.
In the Group Features section, enter the feature into the text field and click Add New.
Repeat the process for each group feature you wish to add.
Click Save Changes.
For more information on Product Groups, see Product Groups.