What happens next in this paragraph?

How to manually update google play
Head to security settings.
Tap the gear icon on your home screen or apps drawer then find " security " from the options.
Check " unknown sources.
Scroll down through the security settings until you get to " unknown sources " and make sure it has a check mark beside it. This will allow you to install apps that aren't from the version of google play you are currently running (like the updated version).