Traditionally Used to cleanse a space or a person of negative energies, purify the environment or an object, as well as provide protection. Proven the have antibacterial qualities, smudging can even cleanse the air! 
Commonly used for ceremonial work or 
when moving into a new residence.
 
~Focus your intent and will towards the release of the previous energies and charge your newly focused intent upon blessing and charging the space, person, or object with the newly desired energies,
~Speak aloud your desired intentions
 ~Many people open their windows to ventilate and let out the smoke and previous energies. 
~ Waft smoke towards all corners of the room and around 
doorways