This paper examines the marketing strategies employed by Sainsbury's and ASDA, two prominent supermarket chains in the UK. It analyzes their application of the 7Ps marketing mix, including price, product, place, promotion, people, process, and physical evidence, and evaluates how these strategies contribute to their business objectives. The paper also includes a comprehensive marketing plan for Sainsbury's, outlining its situational analysis, SWOT analysis, goals, objectives, and strategies for achieving sustainable growth and market dominance.