Using Shopee coupons is very simple, just follow the steps below:

1. Open the Shopee App and log in to your account.

2. Browse and select the items you want to buy and add them to the shopping cart.

3. Make sure you have selected the coupon that applies to the selected items. You can view the available coupons on the product page or the shopping cart page.

4. Click on the shopping cart icon to view your shopping cart and confirm that you have selected the correct items.

5. There will be a "Coupon" box at the bottom of the shopping cart page. Click on the box to view the available coupons.

6. Select the coupon you want to use and click "Get" or a similar button to add it to your order.

7. After confirming that the coupon has been successfully applied to the order, continue to checkout your order.

8. On the payment page, you will see that the order total has been subtracted from the coupon amount.

9. Select your payment method and complete the order payment process. Please note that there may be some restrictions on the use of coupons, such as minimum order amount requirements, specific items applicable, etc. Make sure to read the terms and conditions of the coupon for complete information.