Walmart operates a large network of discount retail stores and warehouse clubs, selling groceries, general merchandise, and consumer goods. In the U.S., it runs roughly 4,600 Walmart stores and 600 Sam's Club membership warehouses. Internationally, it has a significant presence in Mexico and a growing position in India. Groceries account for nearly 60% of U.S. revenue; general merchandise makes up most of the rest. Sam's Club charges annual membership fees on top of product sales. Walmart also generates revenue through e-commerce, advertising (Walmart Connect), and third-party marketplace fees. Customers are everyday consumers shopping for value across a wide range of household needs. The company earns primarily on product margins at high volume, supplemented by membership fees and a growing advertising business.