This essay provides a comprehensive analysis of competitive strategy, focusing on four key models: SWOT, PESTEL, Ansoff's Matrix, and Porter's Five Forces. It begins with an introduction to strategic development tools, emphasizing their role in business planning and adaptation to market dynamics. The essay then delves into each model, explaining their frameworks and applications. Porter's Five Forces is examined for its ability to assess market attractiveness and competitive intensity, with a specific analysis of Walmart. PESTEL analysis is used to identify macro-environmental factors, including political, economic, social, technological, legal, and environmental influences, again illustrated with Walmart's context. Ansoff's Matrix is explored for its product and market growth strategies, also applied to Walmart's business decisions. SWOT analysis is presented to assess internal strengths and weaknesses alongside external threats and opportunities. The essay concludes by emphasizing the importance of these strategic tools for business success, offering a practical understanding of how they can be used to analyze and improve competitive positioning. The essay uses Walmart as a case study throughout, demonstrating the practical application of these models.