Ananta Vratham puja is dedicated to Bhagvan Srihari Vishnu and is observed on Ananta Chaturdashi day. Here is the complete Anantha vratham pooja procedure in Tamil. The puja and rituals vary from region to region but the benefits are the same. It is performed for peace, spiritual success and prosperity.
Link – Anantha Vratham Pooja Procedure In Tamil pdf
The observance of Ananta Vrata is believed to secure freedom from all sorrows. The word ‘Ananta’ means endless and devotees believe that Lord Narayana will clear all the difficulties in one’s life, if the Ananta Vrata is observed with utmost devotion.