Navigation is all about figuring out how to get somewhere. If you are lost, hopefully your cell phone can act as a navigation device.
You're most likely to come across the noun navigation when you're learning to sail a boat or pilot a ship or airplane. Large vessels that travel long distances often need some help in planning a route and following it, and that's exactly what navigation is all about. The Latin word navigare, "to sail, sail over, go by sea, steer a ship," is at the root of navigation, and it in turn comes from navis, "ship."