Mantra : The Siddhi Vinayak mantra is one of the most important of the Ganesh Mantras.

Om Namo Siddhi Vinayakaya Sarva Kaarya Kartrey
Sarva Vighna Prashamnay Sarvarjaya Vashyakarnaya
Sarvajan Sarvastree Purush Aakarshanaya Shreeng Om Swaha.

Meaning : The word ‘Siddhi Vinayak’ in Hindi means ‘The God of Achievement and Enlightenment’.  The Mantra means – “O Lord of Wisdom and Happiness, only you make every endeavor and everything possible; You are the remover of all obstacles and you have enchanted every being in the Universe, you are the Lord of all women and all men, amen.”

Benefit : Siddhi Vinayak Mantra if recited 108 times in the proper way can lead to peace, prosperity and siddhi (achievement) of spiritual enlightenment, material fulfillment and also strong social influence.  Like all mantras the benefits can be reaped only if chanted with utmost devotion and faith.