This report provides a detailed analysis of Marks and Spencer's business strategy. It begins with an introduction to business strategy and the context of Marks and Spencer (M&S). Part A of the report examines M&S's organizational resources and capabilities, followed by an analysis of the competitive environment using PESTEL and Porter's Five Forces models. The report then evaluates M&S's existing and potential competitive advantages, and outlines its strategic and tactical objectives. Part B discusses ways to monitor the strategy's effectiveness. The report concludes by summarizing the key findings and providing references. The analysis covers political, economic, social, technological, environmental, and legal factors influencing M&S, as well as its strengths, weaknesses, opportunities, and threats. The report also highlights the significance of brand value and e-commerce in M&S's competitive strategy.