Google Play Services 4.0- Google Developers Blog

This post announces Google Play Services 4.0, a significant update to the core platform for Android developers. It introduces new APIs and features for location services (Fused Location Provider), Google+ integration (App Activities, Moments), Google Maps (MapView, Street View), and game services (Saved Games, Leaderboards, Achievements). It also highlights improvements to the Google Play services client library, emphasizing the importance of keeping it updated for optimal performance and access to the latest features.