This report is a literature review focusing on customer satisfaction within the hospitality industry, specifically using Marriott hotels as a case study. It begins with an introduction to literature reviews and their purpose, followed by an analysis of the concept of customer satisfaction, exploring its importance and impact on profitability. The report examines strategies for improving customer satisfaction, including providing excellent customer service, offering innovative products, gathering customer feedback, and implementing customer relationship management. The report synthesizes the views of several authors, including Lu, Lu and Neale, Kandampully, Zhang and Bilgihan, Rahimi and Kozak, Berezina, Bilgihan and Okumus, Kimes and Wirtz, Bowie, Buttle and Mariussen, Sari and Suslu, Kim and Park, Assaf, Josiassen and Woo, Gössling, Hall and Andersson, Bowen and Chen McCain, Sun, Fong and He, and Xu and Gursoy. The conclusion emphasizes the crucial role of customer satisfaction in achieving business success, highlighting the impact on profitability and competitive advantage. The report also provides suggestions for hotels to improve customer satisfaction and maintain profitable clients.