Lord Vishnu is one of the most important Hindu Gods to many devotees across the world. He is a part of the Trimurti of Hindu Gods along with Shiva and Brahma. While Brahma is known as the Creator and Shiva as the Destroyer; Vishnu is the Preserver of our Universe.
Throughout the ages Lord Vishnu has manifested in different Avatars either on earth or in heaven. His purpose has always been the restoration of Dharma or ?the path of Righteousness? and the destruction of evil. There are many legends associated with him that cement his status as the Swayam Bhagwan.
The most common form of Vishnu is him lying on a huge five-headed snake with Lakshmi sitting near his feet. Now most people consider Garuda to be the Vahana of Vishnu and that is accurate to some extent.