The Group Pricing page allows you to create customer pricing groups. These can be used to give group discounts if you enable
Admin > Modules > Order Total > Group Pricing.
For more information on group discounts, see the group pricing FAQ.
Starting in Zen Cart 2.0.0, an alternative pricing mechanism called wholesale pricing is available.
A separate concept of customer group exists in Zen Cart 1.5.8 and above. A customer may only belong to a single customer pricing group, but may belong to any number of customer groups.