Ganesha, the formless divinity, symbolizes energy from which everything manifests and into which everything will dissolve. So that's the power and strength associated with Ganesha, which encapsulates auspiciousness and is known to remove bottlenecks and obstacles in the path of devotee.
Lord Ganesha, the older son of Lord Shiva, is known as God of knowledge and the remover of obstacles. Lord Ganesha is also called Vinayak ( knowledgeable ) or Vighneshwer (god to remove obstacles). He is worshiped, or at least remembered, in the beginning of any auspicious performance for blessings and auspiciousness.
He has four hands, elephant's head and a big belly. His vehicle is a tiny mouse. In his hands he carries a rope (to carry devotees to the truth), an axe (to cut devotees' attachments), and a sweet dessert ball -laddoo- (to reward devotees for spiritual activity). His fourth hand's palm is always extended to bless people.
A unique combination of his elephant-like head and a quick moving tiny mouse vehicle represents tremendous wisdom, intelligence, and presence of mind.
Ganesha is worshiped by devotees for auspicious start of some event be it business, buying of some property, starting a new endeavour. Ganesha is known to bring in success and vigour in one's endeavour to achieve something in life.
There are many special occasions within the year when Lord Ganesha is worshipped: