What is a Shraddha ceremony, based on the provided text?

The provided text describes a Shraddha as an anniversary ceremony for a deceased individual. In the context of Chapter 35, the story revolves around the Shraddha for Balaji Patil Nevasakar. For this event, a large meal was prepared to be served to guests who had gathered to honor his memory. The narrative highlights that the amount of food was carefully estimated for the expected number of guests, indicating that serving a feast is a central part of the ceremony. The term is explicitly used to refer to Balaji's anniversary event where this feast was held.