Google Play Services is used to update Google services and apps from the company's Play Store.
Pre-installed on Android devices
The app is now a critical part of the Android experience and comes automatically installed on new phones with Google's operating system (OS). If you're running an older phone, you can download it from the Play Store.
It allows Google and third-party developers to update core Google-dependent functionality of their apps. It can update Android settings without the need for an OS update.
Behind the scenes help
Google Play Services runs behind the scenes, improving your app experience with things like faster searches, better maps integration, and improved Wallet support. If you disable the service you may not be able to update your apps.
Improves Android experience
If you have an Android phone then you will want to take advantage of the functionality in this app to make sure you get the best experience from your device.