Talking about electricity puts you in the subject of physical science! Fun, I’d say. Two main types of electricity static and current.
According to atomberg.com static electricity is generated by rubbing two or more objects causing to build up friction
and according to such website as well, current electricity is generated by the flow of electrical charge through a conductor across an electrical field
A page that can help you further advance your knowledge about general electricity in all of it’s states:
Hope this helps. Feel free to ask questions!