This report delves into the consumer decision-making journey, a crucial aspect of modern marketing. It examines the five stages of this journey: problem recognition, information search, evaluation of alternatives, purchase decision, and post-purchase satisfaction. The report uses Nestle, a leading food and beverage company, as a case study, focusing on its strategies for the Christmas 2018 season. It analyzes the key differences in decision-making processes for B2B and B2C, highlighting the importance of tailored marketing approaches. The report also explores various market research methods used to understand consumer behavior and buying decisions, including the influence of psychological, personal, cultural, and social factors. By understanding these factors, companies like Nestle can effectively target consumers and achieve success in the competitive market.