How to setup your first product group
Now that you have installed WHMCS, it's time to set up your products.
To get started, create a product group. Product Groups are collections of related products or services that you will sell. This document illustrates creating a product group for shared cPanel hosting.
Firest, navigate to Setup > Products/Services > Products/Services.
Click Create a New Group.
Enter a Product Group Name, like Shared cPanel Hosting. Specify a headline, tagline, order form template, and the payment gateways that customers can use when they buy items from this group.
After filling out the information, click on Save Changes.
Next, create a product. You can find the documentation here.