Walmart operates a diversified global retail and eCommerce ecosystem serving customers through general merchandise, grocery, pharmacy, and health and wellness services across stores, clubs, and digital channels in the United States and internationally. The company generates revenue from retail sales, pharmacy reimbursement from third-party payers including insurers and government programs, membership fees, and higher-margin digital businesses including advertising, marketplace commissions, and financial services offerings such as payment processing, lending, and money transfers. The business model centers on value-oriented pricing while increasingly investing in supply chain automation, digital platforms, and omnichannel capabilities including online shopping, pickup, and delivery services to support growth in higher-margin digital and financial services initiatives.