There are many different forms of energy that surround us and conform the different actions every single things has. Potential and kinetic have many different forms of energy for example, Elastic, Mechanical, Sound, Heat, Electric and Chemical, and this forms of energy each have different "roles".
One important thing to know about energy would be that you CAN'T create or destroy it, but it can be transformed for example Chemical energy can be transformed into Mechanical, Heat and light, also Mechanical can transform into gravitational or elastic, when you turn on your TV, you are using your Mechanical energy to turn on the TV and the electric energy is then being used to turn it on and it creates light energy in the screen to create the image.
There are 2 differences between potential and kinetic, Potential is energy that is being stores inside things like your body or in other things and you can choose to use it or not like a skier going down a very steep mountain and the Gravitational energy impulses him to go quicker each second. Kinetic energy is the energy that is in constant movement. When you turn on the stove it becomes fire with gas and other chemicals the chemical energy being produced there is moving and being used.
This were a few examples about energy but it is very important to know this because if you have knowledge you know what energies are being used, for example the nuclear energy (gasoline) in the car is not using all the chemicals it has and the other chemicals are being just wasted. You could create a better gasoline or a better engine for taking advantage of all the gasolines components.