The document defines brand equity as the added value a brand provides to a product, highlighting its significance from financial, consumer, economics, and employee perspectives. It primarily discusses the customer-based brand equity model by Kevin Lane Keller, which consists of four key steps: brand identity, brand meaning, brand response, and brand resonance, forming a pyramid structure that builds consumer loyalty and engagement. The model emphasizes creating brand awareness, strong associations, positive emotional responses, and ultimately a deep consumer relationship with the brand.