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