Space Clearing is a simple method for harmonizing energy in a home or work space ... in other words it helps make a room or a space feel good.
Various forms of it have been practiced in ancient India, Egypt, China, Japan and in every native culture around the world.
My two fave authors on the subject are Denise Linn and Karen Kingston.
There are various ways to cleanse a space. Smudge sticks (mine were from holisticshop.co.uk) are bundles of native plants that have particularly appropriate cleansing properties. Simply put the feather is used to disrupt the energy and carry the smoke from a burning bundle of herbs into the corners of the room. When using herbs in this way it's called smudging.
You can also use crystals, essences, drumming or aromatherapy oils for similar effects.
All work in a powerful way to uplift energy and cleanse a space of heavy emotional residue - such as after sickness or arguement.
Its sort of like what we would achieve in our bodies by going on a juice fast. This technique cleanses a space, like opening windows and fresh air pouring through the environment. A true spring clean with a spiritual component.
Afterwards its important to fill the space with light, music or positive energy through a decree or affirmation.
This is a very brief overview of space clearing as I see it, for more detail refer to the books by the authors above.
Love & light