Potential energy is the mass of an object times its height above ground. If you lift a 10 pound object 10 feet it has a potential energy of 100 pound-feet. The energy is released when it returns to...
Any voltage source is a potential waiting for a load so that current can flow and "work" can be done. A battery and your power company that supplies your home are sources of electrical potential...
Any object that is higher than ground level. A plane or bird in the sky; hail before it reaches the Earth; a parachutist; water stored in a dam, a satellite orbiting Earth; are but a few examples.