But in electricity and magnetism our experience may be limited to turning on bulbs, playing with magnets and using them to hold papers on the door of our refrigerator. This limited experience has some advantages and disadvantages. On the negative side, it is more difficult to build a new theory if we do not seem to need it in our everyday life. The point is we NEED the theory. The most basic entity of electricity and magnetism is charge.
Charge is everywhere.
It is the microscopic glue, the one is needed to hold objects together. If it moves, it creates current. We know that we need current. We need current to run all the equipment we have around. From a bulb to computer memories.