What benefits do devotees and writers receive from the creation and study of a detailed Guru biography?

According to Chapter 0, the creation and study of a detailed poetic Guru biography offer profound benefits. For the writer, the act of composing the biography is a form of direct Guru service. Simultaneously, when other devotees study and perform devotional readings (Parayans) of the work, the writer gains the additional merit of serving God in humanity (Jan-Janardan) and performing public service. For the devotees who study the text, this practice helps them to achieve the ultimate purpose of their lives by connecting deeply with the Sadguru's life and teachings.