This report delves into the organizational behavior of Marks & Spencer (M&S), examining its organizational culture, communication models, and employee motivation strategies. The report begins with an introduction to organizational behavior and the context of M&S, a global retailer with a substantial workforce. It then presents secondary research on theories of organizational culture, including clan, adhocracy, market, and hierarchy cultures, as well as Handy's cultural model and Schein's cultural model. The report also explores communication models, such as the interactional model, and their role in fostering effective communication within the workplace, including the 5Cs of communication. Furthermore, it investigates theories of motivation, including Herzberg's hygiene theory, and their application in the context of M&S. Primary research, involving interviews with M&S employees, is conducted to assess the impact of organizational culture on business success, focusing on the role of managers in creating a healthy working environment. The report concludes with a summary of findings and references.