Moxibustion is mugwort burnt for therapeutic purposes.  Think incense with a medicinal purpose. All moxa is used to guide and supplement the yang qi or the vital life force. Above in the photo is an example of salt navel moxa used for warming the interior of the body.  I also use a compressed pole moxa that is great for the tendons and sinews. Moxa is used as part of an overall acupuncture treatment.