Most users never need to worry about this service; it updates silently in the background. However, there are specific scenarios where you might need to download the Google Play Services APK manually:
# Verify Google Play Services APK signature using apksigner apksigner verify --verbose googleplayservices.apk googleplayservice apk
For mobile gamers, the Google Play Games features are built directly into this service. Google System Services Release Notes - Help Most users never need to worry about this
One of the most visible features is how it handles geographical data. googleplayservice apk
It manages "Nearby Share" (now Quick Share) and "Fast Pair" for instantly connecting Bluetooth accessories.