Om(aum) is a one word mantra and yet very powerful mantra among all the other mantras. It is the essence of all mantras. As a rule, every mantra should be begin with Om. Mantra is not complete if Om does not proceed it, that's why we can say that Om is a king of all the mantras. Om gives our body some positive vibrations and make our mind and body calm.

     It is in the form of a pure sound vibration. Om is made from three words A U M.
     A of aum is connected to Mooladhar chakra (bottom of spine plex) and Swadishthan chakra ( just below the umbilicus) . U of aum is related to manipur chakra ( just above the umbilicus).  M of aum is effects Anahat (heart) , Vishudhi (throat) and Ajna (mid of the eye brows) chakra together. We know that chakras are the energy cycles in our body, providing us the energy for different functions. Om makes these energy centers more strong and powerful. With the help of Om we get more physically,mentally and spiritually benefits. So recite Om and be happy. Don't think that this is a religion. Om(aum) is a strong mantra which gives you peace and calming effect.

Hari Om
Manu