Google Play is the cornerstone of Google's ecosystem of content and has become a critical part of Android. It reaches almost all of Android and through Play Services is capable of fixing many of Android's problems. Google Play also is a content library and ecosystem that is accessible on more platforms than almost any other.
Born as the Android Market, it's grown from just a home for apps and is now the one-stop shop for applications, books, movies, music, TV shows — basically anything and everything that you can buy and use on your Android phone or tablet.
Downloading and managing apps
The first thing you're going to want to do when getting a new Android phone is downloading new apps, or re-installing ones that you previously had on another phone. It's easy to do this, and there are plenty of tools to help you get there!
I'm already rooted and already have SuperSU installed via google play but I am not able to make SuperSU install into /system. I can see the option in settings but they are greyed out and unselectable. Do I just need to download the latest SuperSU.zip and flash from twrp? If so is there anything I need to do first because I tried flashing from recovery earlier today and ended up fucking my phone up so badly it softbricked and I had to reflash my ROM. I need info please help thanks.