Palo Santo or "holy wood", is the wood of a tree that grows on the coast of South America.
Burning this wood is a spiritual practice called smudging, used for cleansing, healing, and purification.
Its scent is very soothing and refreshing.
To use:
Light the stick until it flames, allowing it to burn for about 30 seconds, then blow it out.
With a specific intention in mind, use the smoke to cleanse the aura, space, and objects.