Based on the introductory verses, why is the story of Damu Anna included in the Shri Sai Satcharitra?

The inclusion of Damu Anna's story is framed with a clear purpose by the author. In Chapter 25, just before the story begins, it is stated that these holy stories burn away the sins of the Kali age and that Sai wards off all misfortunes for a devotee with one-pointed faith. The author then presents Damu Anna's account as a 'report that shows Sai's love for His devotees.' The narrative of him being blessed with sons is meant to fill the reader's heart with joy and serve as tangible proof of Sai's power and compassion. It's not just a story, but a 'nectar-like' tale intended to strengthen faith and demonstrate how the Guru-Mother helps devotees overcome their difficulties.