There are a lot of people who have always been fascinated with magnets. Magnetism refers to how two objects are usually attracted to each other. There are also times when two objects also tend to repel each other. Magnetism has allowed different types of mechanisms to take place. Electromagnetism, on the other hand, is not only about magnetism. It mixes electricity into its components.
This refers to how electricity and magnetism would need to connect or relate to one another. Electromagnetism can be very useful for trying to know more about electromagnetic radiation. Electromagnetism can also be used to get to know more about electric currents. Basically, studying anything about electromagnetic forces will fall under electromagnetism.