This library is used on many Google apps like Google Play and others. It is used to enhance your user experience on Android for system and external apps. Here you can check a full coverage of Google Play Services beta for Android including the info about how to become a beta tester for Google Play application.
At TestingCatalog we are also tracking application updates and here you can check an updates history for Google Play Services. All recent test reports by TestingCatalog can be found in the community reports section.
Description from Google Play
Google Play services is used to update Google apps and apps from Google Play. This component provides core functionality like authentication to your Google services, synchronised contacts, access to all the latest user privacy settings and higher quality, lower-powered location based services. Google Play services also enhances your app experience. It speeds up offline searches, provides more immersive maps and improves gaming experiences. Apps may not work if you uninstall Google Play services.