Vam is the bija, or seed, sound of the sacral chakra. When chanting the mantra, vam, the power of the sound vibrations is believed to cleanse this chakra, which is the energy center of creativity, pleasure and sexuality.
Yogis chant vam to heal the sacral center physically, emotionally and spiritually. Mantras, particularly single-syllable bija mantras, are usually chanted for their healing sound vibrations, rather than any specific meaning. Chakra mantras like vam are thought to clear the subtle energy pathways in the body in order to create positive change.