Bindu - Standard Yantras possess the Bindu because the central place of your yantra. It is claimed to be the symbolic illustration of the original variety, generally known as ellipsoid or linga. It's viewed as the chakra of pure consciousness, and so, the Crown Chakra Yantra (or Sahasrara Chakra Yantra) https://www.youtube.com/@Mahavidyabaglamukhi