Redeeming a promotional code
Actually, redeeming a promo code is really simple. But the truth is that the process that Google has used to use the promotional codes leads many users to doubt before using it for a simple reason. You will have to perform the same action as if you were to buy the application. Then, when selecting how to pay, you can select to pay with the promotional code. But this makes users doubt because they do not know in what steps they are giving authorization to make the payment and charge us money. In any case, first of all, it must be said that you have two hours to return any application that you have paid for, in case you bought it by mistake, so even if you made a mistake and bought the app, nothing would happen, you could return it and receive a refund of the money from the app.
However, keep in mind when is the moment when you must select the payment method. It is when the amount of money you have to pay appears, and just below the card with which you are supposed to pay. In the case of the image below, it is a VISA card. All you have to do is click on the card, and we will see more options, including Payment Methods and Redeem. As it is a promotional code. We will have to select Redeem, and enter the code in question.
As you can see, the process is simple, but we will have to pay attention to know where to change the payment method, and not pay for the app, but exchange it for the promotional code that they have given us.