Homa is a Sanskrit word used here as a synonym for Yajnya. Yajnya is the technical term from the Vedic science of bioenergy for the process of removing toxic conditions of the atmosphere through the agency of fire. You heal the atmosphere and the healed atmosphere heals you. This is the central idea in Homa Therapy.
Homa is an independent therapy and can also be combined with any other therapy. A lot of healing energy emanates from the homa fire. It is believed to renew brain cells, revitalise skin, purify blood and neutralise pathogenic bacteria.