The Walmart brand audit outlines the company's evolution from a small discount retailer in 1962 to a global retail giant with over 11,000 stores in 27 countries. It emphasizes Walmart's commitment to providing low prices, a broad product assortment, and customer satisfaction through various brand extensions, including Great Value and Sam's Choice. The audit suggests opportunities for Walmart to enhance customer experience by offering additional services and enhancing its e-commerce capabilities, particularly in grocery delivery.