This report presents a research project examining the impact of Corporate Social Responsibility (CSR) on customer choice and behavior, with Marks & Spencer (M&S) as a case study. The research includes an introduction outlining the project's aims and objectives, followed by a data analysis section. The data analysis is structured around several key themes: the importance of CSR, its impact on customers, its role in a firm's promotion, the specific CSR activities performed by M&S, and the relationship between CSR and profitability and sales. The research employs thematic analysis to interpret the data collected. The findings suggest a positive correlation between CSR initiatives and customer behavior, emphasizing the significance of CSR activities in enhancing a company's brand image, customer loyalty, and overall business performance. The report concludes by summarizing the key findings and highlighting the importance of CSR in modern business strategies. References are provided to support the research findings.