Advaita Vedanta is a school of Hindu philosophy and religious practice, and one of the classic Indian paths to spiritual realization. Advaita (Sanskrit; not-two, “no second”) refers to the idea that the true Self, Atman, is the same as the highest Reality, Brahman.
It gives “a unifying interpretation of the whole body of Upanishads”,providing scriptural authority for the postulation of the nonduality of Atman and Brahman.
Followers seek liberation/release by acquiring vidyā (knowledge) of the identity of Atman and Brahman. It emphasizes Jivanmukta, the idea that moksha (freedom, liberation) is achievable in this life.