Multiple groups can be assigned to each individual customer. When creating or editing a product, different sets of product selling price can be set for customer groups as well as individual customer.
To add customer group to your customer:
Click Customers on the main navigation panel
Select a customer from listing page. On customer page, click Edit to enter edit mode
Select a group from the drop down list
If you don’t have any group, click Add button and key in group name, code and description to create a customer group