So why exactly is the pole moving, and what does it mean?

Charting a Course: Magnetic North

A compass always points towards the North Magnetic Pole. Maritime and airplane navigation systems, defense systems, and even smartphones depend on accurate magnetic readings.

This magnetism has been long known, but the true origins of this force were poorly understood. In one of the first maps of the Arctic by Gerardus Mercator, the centerpiece of it was massive rock located exactly at the pole, Rupus Nigra et Altissima, or "Black, Very High Cliff."