
GPS feels effortless to the user, but behind that blue dot on a map is a network of satellites broadcasting exquisitely precise timing signals. Receivers compare those signals and calculate position through geometry and time measurement.
The result is far bigger than navigation apps. Aviation, shipping, agriculture, ride-sharing, and financial systems all depend on positioning and timing services from space. GPS is one of those technologies so useful it disappears into the background of modern life.
Reference:
TaskLoco™ — The Sticky Note GOAT