According to Wikipedia: Incense is aromatic biotic material that releases fragrant smoke when burnt. The term is used for either the material or the aroma. Incense is used for aesthetic reasons, religious worship, aromatherapy, meditation, and ceremony. It may also be used as a simple deodorant or insect repellent.
Incense sticks, which contain high concentrations of essential oils, are a common tool for aromatherapy and are often used in conjunction with yoga and meditation to create a calming atmosphere.
Incense is claimed to cleanse and restore energy in healing stones. The technique used is called “smoke cleansing” and is done by holding a healing stone over the smoke of burning incense for 20 to 30 seconds. Some people believe that this process not only restores energy but eliminates negative energy.