You can create coupons, bundle discounts and volume discounts for your products in Vendor Control Panel > Manage Offers > Create New Offer.
Coupons are simple text string which may be given to a customer to receive a discount on an order or product. Bundle automatically applies discounts to two or more products when they appear in the same order. Volume discount offers discount prices based on purchase quantity of a product. Be aware that bundle discounts and volume discounts are not applicable to products sold as subscriptions.
When multiple discount offers are applicable to an order, the system automatically picks the best price of each product in the shopping cart. The customer is able to see both the standard price and discount price of each product in the order.