I think a lot of developers are trying to learn more about the new Google Play App Signing feature presented at Google I/O 2017.
The ability to store the keystore to sign the apps inside Google Play save you the effort to safely store the keystore and can help the system to optimize the APKs served to every device, based on hardware and OS characteristics.
You can read more about this topic in the official documentation here : https://developer.android.com/studio/publish/app-signing.html#google-play-app-signing.
With the following answer, i will explain a bit better the steps you need to follow to upload your original keystore and how to create the new upload keystore, which you will need to sign your APK from this point onwards.







