There are two main types of mechanical energy. They are motion energy and stored mechanical energy.
Motion energy: This is the energy something has because it is moving (eg a speeding cricket ball). You can feel the effect of this energy if the cricket ball hits you. Motion energy is also called kinetic energy.
Stored mechanical energy: This is energy something has stored in it because of its height above the ground or because it is stretched or bent or squeezed (eg in a stretched rubber band). You can feel it when the band is released.
Stored mechanical energy is also called potential energy.