How GPS Determines Your Location
The gist
GPS figures out your location by using signals from multiple satellites that tell your device how far away they are, allowing it to pinpoint your exact position.
Explain like I'm 5
It's like if you heard several friends shout their distance from you, and by knowing how far each one is, you could figure out exactly where you are standing.
Big picture
GPS is crucial for navigation, helping everything from driving directions to emergency services find you quickly and accurately anywhere on Earth.