The Shree Siddh Chandra Dev Yantra is a sacred and powerful yantra in Hinduism, associated with the worship of the Chandra Dev (Moon God). The Moon God, also known as Soma in Vedic texts, represents emotions, mind, and mental peace. The yantra is believed to bring healing, spiritual growth, prosperity, and mental tranquility to the devotee by invoking the blessings of Chandra Dev.