Vishnuism is a major tradition within Hinduism that focuses on the worship of Vishnu, one of the principal deities. Followers believe that Vishnu is the preserver and protector of the universe, often incarnating in various forms, known as avatars, to restore cosmic order. The most famous avatars include Rama and Krishna. Devotees of Vishnuism engage in various rituals, prayers, and festivals to honor Vishnu and his avatars. Key texts include the Vishnu Purana and the Bhagavad Gita, which provide teachings and stories about Vishnu's divine nature and his role in the world.