This report provides a comprehensive analysis of Sainsbury's marketing process and planning strategies. It begins by defining marketing in the 21st century and explores the role of the marketing function within the organization, including pricing, promotion, and marketing information management. The report evaluates the interaction between the marketing function and other business units like human resources, operations, and finance. It describes the extended marketing mix (product, price, place, promotion, people, process, and physical evidence) with examples from supermarkets like Sainsbury's and Tesco. Furthermore, the report assesses how the marketing mix contributes to Sainsbury's overall business objectives and offers recommendations for improvement, such as leveraging social media marketing and influencer campaigns. The second part focuses on marketing planning, including the link between strategic marketing plans and corporate objectives, SMART marketing objectives, marketing research for new product launches, situational analysis using SWOT, PESTLE, and 5C analysis, competitor analysis, value proposition articulation, and the development of marketing strategies within the extended marketing mix. It also covers budget allocation, tactical actions, control and monitoring measures using ROMI and CLV, and a comprehensive media plan with budget, rationale, and channel selection.