Om Mani Padme Hum is the mantra of Buddha Avalokiteshvara, also known as Buddha Kwan Yin. The repetition of this mantra brings down Blessings and Diving Energy from the Buddha of Mercy and Compassion. When chanting Om Mani Padme Hum, all higher, ordinary, and lower Sentient Beings witha certain range will be, to a certain degree, Purified, Healed and Soothed of their suffering, discomfort and pain. The person reciting this manta, other people and Sentient Beings around those chanting, will experience increased Calmness and Inner Peace.  Om Mani Padme Hum is indeed a Mantra of Mercy and Compassion