1. Go to https://wallet.google.com
1. Go to https://wallet.google.com and log in with the same ID you log in in your google devices
1. Go to https://play.google.com/store?code
Google Play Gifts Card is a money card that can be redeemed on Google ID. After redeemed you can buy products and services from Play Store (Apps, Book, Movies, and Games) anywhere you want. Basically, it’s a code that can change to money in Google wallet.