According to the text, what is the spiritual significance of performing Parayans of a detailed Guru biography?

As explained in Chapter 0, studying and performing Parayans of a detailed poetic Guru biography serves a dual purpose. For the writer, it is a form of Guru service. Simultaneously, when other devotees engage in these Parayans, the writer accrues the merit of serving God in humanity (Jan-Janardan) and performing public service. Furthermore, Chapter 0 states that these other devotees, through their study and devotion, also achieve the ultimate purpose of their lives. This devotional reading is a key way the Sadguru accepts service from his followers.