गणेश Ganesh said to have the power to remove all obstacles, guardian of Knowledge, representing state of consciousness where a man reaches self-realization and plenitude of gifts.

Lord Ganesha’s Mantras can be chanted out loud or internally, has been used throughout the centuries, and it is believed that the sacred power of words and the accompanying sounds in mantra aid in spiritual progression and to effect healing in the physical and energetic bodies.

OM GAM GANAPATAYE NAMAHA Mantra is Sanskrit and in the ancient lenguaje each word means a feeling and a quote, more that just one word of expresión.

Om = The name of the creation, Salutations
Gam = The secret power sound of Ganesh's name
Ganapataye = Another name of Ganesh, breaker of obstacles.
Namaha = From the center of my being I See your holiness & I thank you.

"Saludo desde lo mas profundo de mi Ser al Señor de los Clanes, removedor de todos los obstáculos de la vida Ganesha gracias por tu ayuda "x 108
“I salute from the deepest of my being to the Lord of the Clans, the obstacle remover of all issues in life Ganesh I thank you for assisting me”x 108

As for the number 108, it has been a sacred number in different cultures, the individual numbers 1, 0, and 8 represent one thing, nothing, and everything (infinity). 108 represents the ultimate reality of the universe as being simultaneously one, emptiness, and infinite.
That is also why Malas have 108 beads.

Namaste.