There are two important values associated with Anant Chaturdashi. The first is that it represents the day of the immersion of Ganpati. On this day, the festival of Ganpati comes to an end. The installed Murtis of Lord Ganpati are taken to a sea, a river or a lake in great processions to be immersed in the water. Thus Lord Ganesha is departed, only to be welcomed the next year.
The second reason for celebrating Anant Chaturdashi is that on this day, people recite and listen to the legends and stories of Lord Vishnu who is Anant, the Infinite. They also recite hymns from the Vedas. This is also called Ananta Vrat.