Click the Copy And Go To Amazon button and you will be redirected to amazon with the promo code copied to your clipboard.

Often time Amazon has additional discounts that can be applied to get an even better deal. See highlighted area below.

Sometimes the code is already displayed in this section. In this case, you can just click the redeem button and the code will be automatically applied at checkout.

If you click buy now on the right hand side, you will see a pop up window like this. it’s a bit hard to find where to input the code.

Just click the Pay with section, highlighted in green below.

Scroll down to the bottom of the pop up window. You should see Gift cards & promotional codes. Past the code in here. If you already clicked redeem, then there’s no need to do this.