The document discusses competitive advantage, which is an attribute that allows a company to outperform its competitors through superior margins or value. Competitive advantages must be difficult to duplicate. Examples include access to resources, skilled labor, technology, or low costs. Companies establish advantages by clarifying benefits, targeting markets, understanding competitors, and employing strategies like cost leadership, differentiation, or focus. Strategies involve low costs through scale or differentiating products. Maintaining an advantage is important for business success and survival against competitors.