There are many "forms" of energy, i.e. kinetic, electromagnetic, and heat energy. However, these are all just different ways of measuring energy. Essentially all energy is simply motion. It is movement itself. The whole universe is constantly moving, continuously transforming. Everything is in flux.
The point of this narrative is to explain that the whole universe, everything that exists, is made up of the same stuff, energy. And what's more, all of the energy that exists today has always existed, and according to the greatest scientific and mathematical achievements of mankind, will always exist. One very profound understanding that becomes apparent when we grasp this notion, is that we are eternal. What we actually consist of is constantly changing, but it always exists.