Ganesh Chaturthi is a Hindu festival celebrated in honor of Lord Ganesha, the God of wisdom, knowledge, and new beginnings. The festival usually falls in the months of August or September and is celebrated for 10 days. The festival is celebrated with great enthusiasm and devotion, especially in the states of Maharashtra, Goa, and Karnataka.

The puja or worship of Lord Ganesha is an essential part of the Ganesh Chaturthi festival. The puja usually starts with the installation of a clay idol of Lord Ganesha in a pandal or a specially constructed temporary shrine. The idol is then decorated with flowers, garlands, and other ornaments.

The puja begins with the chanting of mantras and the lighting of lamps. The priest then performs the aarti, where he waves a lighted lamp in front of the deity to show reverence. This is followed by the offering of sweets and other delicacies to Lord Ganesha as prasad.

The puja concludes with the immersion of the idol in a water body like a river, lake, or ocean, which is known as Visarjan. The Visarjan is usually done on the last day of the festival, and it signifies the departure of Lord Ganesha from the mortal world.

Overall, the Ganesh Chaturthi puja is a beautiful and elaborate celebration of Lord Ganesha's blessings and teachings. It is an occasion to seek his blessings for success, prosperity, and happiness in life.