android what is the difference between Android Support Repository vs Android Support Library vs Google Repository vs Google Play Services

Google Uses the term repository at the end to specify these are Maven Repository and you should import them using a Gradle dependency like this:

dependencies {
   compile "com.google.android.gms:play-services-gcm:8.4.0"
}

But the Gradle build system is only supported in Android Studio, where as Eclipse uses the older Ant build system.

Also mentioned here in google documentation

3. Select the Android Support Library item.

   Note: If you’re developing with Android Studio, select and install the Android Support Repository item instead.

so if you’re using the Eclipse IDE use these libraries:

• Android Support Library
• Google Play Services

and if you’re using Android Studio use these libraries instead:

• Android Support Repository (New name: Local Maven repository for Support Libraries)
• Google Repository