First, add items you would like to purchase to your shopping cart. Then apply discount code at your shopping cart and you can enjoy the discounted price at check out.

No. Only one discount code can be used for one order, and discount codes cannot be used at the same time, nor are they cumulative and stacked.

No, they are different. You can only use gift card at check out. You can use both discount code and gift card for the same order.