' What do you mean by Advaita? '...

Advaita Vedanta is a school in Hinduism.

People who believe in Advaita believe that their soul is not different from Brahman.

Because of this theory of one being, his teachings became popular as the "Advaita" (a = not, dvaita = two, means no-two or non-dual).

The way he said this to people was "Atman is Brahman."


-From Google