When we talk about energy, we're talking about electricity and gas. The idea behind energy management is to use these resources more efficiently and in so doing, save on your company's electricity and gas bills, while helping to protect the environment.
Energy management can be as simple as ensuring that air conditioning units are in proper working order, making sure lights are switched off when not needed, and using electric fans instead of air conditioning where possible. You'd be surprised how quickly it all adds up to savings on your bills.