Bindu - Standard Yantras contain the Bindu because the central stage of your yantra. It is claimed being the symbolic representation of the original form, referred to as ellipsoid or linga. Yantras linked to overall health, like the Mahamrityunjaya Yantra, is claimed to obtain healing Qualities. They're used in rituals https://www.youtube.com/@Mahavidyabaglamukhi