The Long Tail concept describes the extended range of products or services in retail, where individual items may have lower demand but collectively contribute significantly to sales. This contrasts with high-demand items at the "Head." Coined by Chris Anderson, the concept underscores the profitability of niche markets and the advantages of offering a diverse product selection. Online retailers, in particular, leverage the Long Tail by providing a broad array of products, catering to diverse customer preferences, and capitalizing on the cumulative sales of less mainstream items.