Mantra Yoga focuses on sound and chanting out loud. Mantras can be phrases, words or syllables. They are chanted to attain transcendence of the mind and emotions. Different words, phrases or syllables can have unique healing qualities. Therefore they are chanted at specific times. Mantras can be used as a tool to achieve total stillness. When a moment of stillness is attained, the mantra is discarded.
Since our mind tends to wander often, the music of mantras can easily bring the mind back to the intention of the meditation. The rhythm and the meaning of the mantra combined can guide the mind back to the point of meditation, therefore achieving higher spiritual focus and consciousness.