Well they can be used to make electromagnets that can power a lot of things like door bells and if you have a large not like the size of a fist larger enough to power a house or a decent sized building.
So we know that there are two types of electric currents AC and DC. (AC-DC). The flowing electrons produce something called a magnetic field and the spinning magnets cause Electric current to flow between copper wire.
Example time!
Take a battery, copper wire, and a magnet. Battery connection thing. So place the battery at the bottom put the magnet on top. With the copper wire put it into loops and when place above the battery and magnet. Give it a slight push and it should spin because of the reaction
