Go to your App in the "Benefits" section. Go to the "Coupons" benefit
Select the card you are interested in and read the terms and conditions that apply to each coupon.
Click on "Request coupon" to enjoy the discount.
Enter the amount of the purchase you wish to make in the chosen shop and you will automatically see the actual amount of your purchase thanks to the discount:
Click on "Complete purchase" and pay with your personal credit card:
You will receive an email with your discount code and instructions on how to make your purchase with the savings.