title: integrate In-app Promotions
body: <p>I am using the in-app billing in my android application, but I do not know how to integrate the in-app promotion with my app. I have tried to read this resource <a href="https://support.google.com/googleplay/android-developer/answer/6321495" rel="nofollow noreferrer">here</a>, but I didn't understand any thing. the application is providing the payment methods except the redeem, please any help how to integrate it?
  note: I'm using in-app billing v3</p>