How to Apply Coupon code In the Shop :
After you add products to The Shopping Basket click on View Basket to the right Block ..

You will notice a text :
Got a gift certificate or promotional code?

to the right of the text (Enter Code) and a box, write or paste the code of the coupon


After you click On Apply Changes you will notice the Basket Total Amount Has been Change Which Is the Amount that You Will Pay. And you will find text ( Discount code has been applied successfully! )