This report explores the impact of leadership on organizational performance and business practice. It discusses the various ways in which leadership influences productivity, morale, customer satisfaction, positive interactions, and training in an organization. The report also examines different leadership models, such as contingency theory and Fiedler model, and their application in a real-world context. Additionally, it explores motivational theories, including Vroom's expectancy theory and Adam's equity theory, and their role in driving employee performance. Lastly, the report discusses the impact of leadership on organizational culture and diversity management, highlighting the importance of organizational functions, performance measurement, and leadership culture. The case study of Diageo, a leading international beverage company, is used throughout the report to provide practical examples and insights.