You can add and modify shopper groups in VirtueMart using the Shopper Group List, which can be accessed through the menu: Shopping Cart > Shopper > List Shopper Groups.
Note: You cannot delete shopper groups which still have customers assigned to them.
To add a new shopper group, just click on the “New” button in the toolbar. In the following shopper group form just fill out the necessary fields.
Note: There’s only one “default” shopper group. Whatever shopper group you set as default, its settings are used for new customers. New customers are automatically assigned to the default shopper group.