Every space holds energy. Even though you can’t see it, you’ve probably sensed it.
Many commonly used expressions indicate that we intuitively understand that buildings and places can have a certain vibration or feel. Like something has a “good vibe,” Or you just cant wait till you can step out of some places as they make you very uneasy. perhaps you’ve even simply said that a place had “good energy.” 
Energy clearing is the act of making a living space more liveable by removing and clearing the negative energy or old and stagnant energy, within it. When you clear your space, you will 'feel' the difference in the energy of it and also within its occupants.