Can you explain why Shirdi is considered such an important place for devotees?

According to the source material, Shirdi's importance is intrinsically linked to Sai Baba, who made the town glorious in the same way other saints sanctified their towns. Chapter 4 elevates Shirdi to the status of numerous holy sites combined, referring to it as Pandharpur, Jagannath, Dwarka, Gaya, Kashi, and Rameshwar. For followers, association with Sai in Shirdi represents a very easy spiritual path and the pacification of worldly life. The text also states that Shirdi is the center of Baba's vast field of influence, and visiting his Samadhi there is considered the true fulfillment of being born, a place where the knots of the soul are cut at every step.