The main advantage of using Google Play to sign our apps is that Google maintain key information and if, by some misfortune, we lose ours, this can be retrieved. One very important thing to note about this system is that, once adopted, there is no opt-out option. This is because this would itself represent a possible security breach.
To enable Google Play app signing, prepare your signed APK as described in the preceding steps, and then open the Google developer console. Google Play app signing is available from the Release management menu.
This will then open the Terms of Service dialog.