This case study investigates the influence of Corporate Social Responsibility (CSR) on customer behavior, using Lidl UK as a case study. It explores the evolution and theories behind CSR, particularly Carroll's CSR pyramid, and examines how CSR policies affect consumer awareness, willingness to pay more for socially responsible products, and overall customer loyalty. The research questions address consumer awareness of CSR, its influence on consumer choices, and the premium consumers are willing to pay for products from socially responsible companies. The study highlights the increasing importance of CSR in business and its potential impact on a company's market share, particularly within the competitive UK grocery sector. It uses Carroll’s framework and concentrates on CSR activities that go beyond the company's primary duties. The study ultimately aims to understand how Lidl UK's CSR efforts affect customer perceptions and contribute to increased satisfaction and loyalty.