Customer Group Track give you complete control of individual customer assignments to price groups and availability groups.
Edit customer group assignments in the Customer admin tab. You have the capability of configuring your customer's groups all in one screen.
No need to switch back and forth from screen to screen in the Price Group and Availability Group Tabs.
This utility will make assignments easy, or easier, especially if your MivaMerchant store is a wholesale business and/or you have many types
of price groups or availability groups.