Vedanta refers to the philosophical traditions and sutras that were based on, and aimed to synthesize, the teachings of the Upanishads, Bhagavad Gita, and Brahma Sutras. The document outlines six primary concepts of the Upanishads: Brahman as the ultimate impersonal reality; Atman as the true self; Avidya as ignorance of reality/self; Samsara as the cycle of rebirth fueled by karma; and Moksha as liberation from samsara through realizing the identity of Atman and Brahman. It also discusses the different views of Brahman and debates around its nature.