The meaning of the sloka "Vakratunda mahakaya..." is
The Lord With The Curved Trunk and Mighty body
Having magnificance with million Suns,
I pray to you Lord to remove all
Obstacles from the work that I do.
This is the famous sloka for the first or agraganya god - Ganesha. Ganesha is worshipped all over india with equal respect. He is the god of prosperity and wisdom. Ganesha bestows all happiness and peace to his followers. Let us again read "vakra tunda maha kaya surya koti sama prabha nirvighnam kuru me deva sarvajataye sarvada". Oh lord be with me and direct me for proper work.
Ganesha symbolizes the special rudraksha bead. And the bead looks same like the lord ganesha and hence called Ganesha Rudraksha.