Google Play services let you easily add more features to attract users on a wide range of devices, while using well-known features powered by Google. Using these services, you can add new revenue sources, manage the distribution of the app, access statistics, learn about your application's users' habits, and improve your application with easy-to-implement Google features such as Maps or Google's social network, Google+. The services are explained as follows:
Games: Using the Google Play Game service, you can improve your gaming with a more social experience.
Location: By integrating the location APIs, you can make your application location-aware.
Maps: By integrating the Google Maps API, you can use the maps provided by Google in your application and customize them.
Google+: Using Google+ Platform for Android, you can authenticate the user of your app. Once they are authenticated, you can also access their public profile and social graph.