Lord Vishnu is the sustainer of this entire universe and his consort Goddess Lakshmi is the Goddess of wealth. Hence, the worshipper of Vishnu Lakshmi gets the blessings of Lord Vishnu thereby giving him peace, prosperity, happiness and protection from all kinds of evil energies, evil forces, enemies and negativity around him. He also gets the blessings of Goddess Lakshmi at the same time so that he is blessed with unlimited Wealth, Success, Prosperity, Name & Fame. Any person who gets a combined blessings of " Vishnu Lakshmi " is able to achieve Success very easily, all the obstacles pertaining to every aspect of his life are removed and he is able to enjoy all the worldly comforts and luxuries.
In this Vishnu Lakshmi Idol, Lord Vishnu and Goddess Lakshmi are sitting together and giving their combined blessings to their devotees. Sheshnaag (Snake) is protecting them.