I understand you're asking for a "deep paper" about a specific search phrase: "google play services for android 44 2 apkpure top" . However, this phrase appears to reference a potentially outdated or unofficial APK download for Google Play Services (version 44.2) from APKPure.
Google Play Services is not an app you open to use. It is a background package that links your phone to Google's core infrastructure. google play services for android 44 2 apkpure top
When downloading and installing Google Play Services from APKpure Top or any other third-party source: I understand you're asking for a "deep paper"
Other alternatives include APKMirror (known for its strict signature verification) and third-party OEM stores like Samsung Galaxy Store, though those are limited by hardware compatibility. google play services for android 44 2 apkpure top