Who is Vishnu from The Bhagavad Gita and what is their importance?

Vishnu is the Maintainer and Preserver of the universe. Krishna is known in Hindu philosophy & religion as the 9th incarnation of Vishnu. This was discovered due to the way that he behaved during the conversation that is shared during the Bhagavadgita. What he said caused Arjuna to see Him— Brahma, Vishnu and Shiva—there and through the dangers that awaited them.