1) Login to the site
2) Insert in the cart the products belonging to the category / brand / promotion related to the DISCOUNT CODE you want to use
3) Go to payment (checkout), click on the item PROMO CODE and enter the coupon code of your interest in the box (see image), then click on the "ADD" button; the products linked to the promotion of the discount code you have chosen will receive an additional additional discount
4) Proceed with the finalization of the order by choosing the Payment Method and filling in the other required fields.