Vishnu is the supreme god in Vaishnavism. He is the creator, preserver, and destroyer of the universe.

The goal of Vaishnavism is to become one with Vishnu. This can be achieved through devotion, meditation, and selfless service.

The four main Vaishnava sects are Sri Vaishnavism, Madhvacharya Vaishnavism, Nimbarka Vaishnavism, and Ramanuja Vaishnavism.

Ramanuja is the founder of Sri Vaishnavism.

Ramanuja's main teaching is that bhakti, or devotion to Vishnu, is the path to salvation.

Madhvacharya is the founder of Madhvacharya Vaishnavism.

Madhvacharya's main teaching is that dvaita, or dualism, is the true nature of reality.

Nimbarka is the founder of Nimbarka Vaishnavism.

Nimbarka's main teaching is that dvaitadvaita, or dualism-nondualism, is the true nature of reality.

Ramanuja is the founder of Ramanuja Vaishnavism.

Ramanuja's main teaching is that vishishtadvaita, or qualified nondualism, is the true nature of reality.

The Bhagavad Gita is the most important text in Vaishnavism. It is a dialogue between Krishna and Arjuna on the nature of reality, the soul, and the path to salvation.

Vishnu is the creator, preserver, and destroyer of the universe.

The devotee's role in Vaishnavism is to worship Vishnu, meditate on Vishnu, and serve Vishnu.

The ultimate goal of the Vaishnava devotee is to become one with Vishnu.