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In the competitive landscape of retail, innovation often separates market leaders from the rest. Tesco, one of the world’s leading retailers, faced a unique challenge in South Korea—a market characterized by busy lifestyles and intense competition. By leveraging QR codes, Tesco transformed its approach to customer engagement and convenience, setting a new benchmark for retail innovation. This article delves into the Tesco Korea case study, examining how QR codes enabled the retailer to connect with tech-savvy consumers, streamline shopping experiences, and drive sales growth.