Copy the promo code in your clipboard and then go to the Nasty Gal website. Browse and choose the products you want to buy, then place them in your cart. Click on the cart if you are done and check the product list and price. Now click on 'Check Out' to proceed. Here you will have to sign in and enter delivery methods and other information. Now paste the promo code in the box 'Enter promotion code' and then click apply. Look for the price update in your bill and enjoy the discounts.