What is the primary purpose of the invocations mentioned at the beginning of Chapter 1 of the Sai Satcharitra?

According to Chapter 1 of the Sai Satcharitra, the primary purpose of the auspicious invocations, or 'Mangalacharan', is to ensure the obstacle-free completion of the task at hand. The text explains that this traditional practice is adopted to obtain the grace of the desired deity and for the removal of all obstacles. The author states, "The reason for this auspicious beginning is the removal of all obstacles; the purpose is the fulfillment of the desired goal." This is why salutations are offered to deities like Lord Ganesha and Goddess Saraswati before the author proceeds with writing the book.