Aum(pronounced "OM ") is the essence of all  mantras that represents cosmic consciousness,beyond  words or concepts .Aum is a symbolic word for the  perfect ,the infinite  and the eternal ,as well as the origin of all creations.

Aum’, which is considered the sacred word in hindu literature and is looked up as the audio-visual representation of the divine. 
With the sound of Om resounding through the universe, Ganesha appeared against the light of the first dawn, blowing the conch through which the sound of om had emanted.   An idol gift for a new house or a buissness prosperity.Can be plased at the entrence or in pooja room also

Om require distinct knowledge and wisdom, Om helps us in many way and i have seen wonderful results, time you meditate with Om. Om generates lots of positive vibration it helps  you to harmonized all chakras of body,it is gift from the god - nature om is peace Om is love Om is life Om is universe Om is everything.

You will find Om symbol everywhere  all temples has Om, all mantra has Om, all hindu religious literature has Om, all god and goddess has om with them, Om is powerful positive energy generators Om is Universe also it is to be said that time you pronounce Om .