It can bring peace and balance to the body, and is known to relieve people from numerous physical and mental ailments when practiced regularly.
OM chanting is known to have transcendental qualities. The mantra helps concentrate the mind and prepares it for deep, sustained meditation periods. These meditations are based on mantra, which in Sanskrit means a sound, a certain utterance or a syllable. Between the two is a stepping stone called OM meditation or in some traditions, AUM meditation or OHM meditation.
You probably know that yoga h as something to do with movement and meditation has something to do with sitting still.