Purchase Rules lets you control how customers buy. Create rules with a minimum quantity, a maximum quantity, or a multiple-of step, and apply them to hand-picked products or whole collections. Rules guide shoppers on the product page and are enforced at checkout, so invalid carts cannot complete payment. Add volume pricing per variant with fixed unit prices or percentage discounts, shown to customers in a price table. Manage tiers one by one in the product admin or in bulk with CSV import and ex