The text mentions 'Shraddha' in the context of Bhagwantrao Kshirsagar. What is it, and why was it significant in his story?

In the story of Bhagwantrao Kshirsagar, 'Shraddha' refers to the death anniversary rites for his father. Its significance is highlighted when Sai Baba points out Bhagwantrao's neglect. After his father, a great devotee of Vitthal, passed away, Bhagwantrao not only stopped the daily worship and food offerings (Naivedya) to the family's Vitthal idol but also skipped the Shraddha. As detailed in Chapter 4, Baba, who considered Bhagwantrao's father a friend, brought Bhagwantrao to Shirdi specifically to remind him of these forgotten duties, stating that by neglecting them, he was keeping both Vitthal and Baba hungry. This shows the importance Baba placed on honoring ancestral and religious traditions.