About Vishnu Mool Mantra
Narayanaya is a name of Vishnu, the Preserver of the world. After the Creation, it is the energy of Vishnu which maintains order to the universe.
Whosoever chants the 'Om Namo Narayana' mantra reaches the ultimate goal Vaikuntha planet where one attains eternal blissful life. Vaikuntha is the supreme spiritual abode; there is nothing that exists beyond Vaikuntha, Vaikuntha means 'no desires.'
The Vishnu Mool Mantra
OM Namo Narayanaya.
Om Namo Bhagavate Vasudevaya.
I offer homage to you, O master of all the gods! O Shri Vishnu.