The document discusses various types of promotions, vouchers, and offers that can be created in Drupal Commerce using rules and price components. It provides examples of implementing fixed price discounts, time limited discounts, order value limited discounts, forced pricing, multibuy discounts, product specific discounts, percentage discounts, free gifts, vouchers, integrating third party offers, bulk coupon generation, and handling supplied coupons. It also mentions that more flexible discount functionality is coming in the Commerce Discount module.