Why Car navigation can know where we are?

When we drive, car navigation know where we are.

If we set our destination, it guides us and tells us estimated arrival time.

Why can it do that? it can see where we are now by continuing to receive electrical signals from artificial satellites called GPS(Global Positioning System/Satellite).

Approximately 30 artificial satellites are orbiting the earth, and the sensor of the car receives the information sent from 3 to 4 artificial satellites among them and determines the current position.

The car navigation shows several routes and estimated arrival times, and selects the most suitable route.
If it gets the information on traffic jams or traffic regulations while the car is running, the route may change.
VICS(Vehicle Information and Communication System) provides traffic information and other information.
Car navigation with VICS functions can avoid traffic jams by relying on information.