What is the primary reason for the invocations at the beginning of Chapter 1 of the Sai Satcharitra?

According to Chapter 1 of the Sai Satcharitra, the primary reason for performing auspicious invocations, or Mangalacharan, at the start of a task is to ensure its obstacle-free completion and to obtain the grace of the desired deity. The author states that this traditional etiquette is adopted for the removal of all obstacles and the fulfillment of the desired goal. This is why the chapter begins with salutations to various deities, including Lord Ganesha, to seek blessings for the successful writing of the book without any impediments.