What Are the Fields?

In c f t quanton field theory, the universe is made of fields. The actual universe that we experience is an illusion. So i am inside this field. This room is a field. It's everywhere on the planet. And now the other question is, so that is, what fields are? I there are different kinds of fields. In c efty,. there are at least 17 fied there are 17 fields thers o o, gravitational field, which is not part of the ort of of the standard model, and so on. Now, how are the electric and magnetic fields interrelated with each other? Their relation is very simple. Look at the maxwell field equations