Allow discount codes to give free items based on purchase conditions, such as Buy 1 Get 1 Free or Buy 2 of Product A, get 1 of Product B free. Merchants can set which products trigger the promo, which item is free, limit usage per customer, and choose to auto-add the free item or apply a 100% discount. Example: Code FREELG → Buy 2 Apple Kombucha, get 1 Apple Lemon Ginger free (limit 1 per customer). This makes bundle promos easier, encourages larger orders, and reduces manual setup.