This dissertation analyzes the effectiveness of internal marketing strategies within TESCO PLC, a multinational retailer. The study explores the impact of internal marketing on employee performance, loyalty, and engagement. It delves into the theoretical and conceptual understanding of internal marketing in the retail sector, examining the relationship between investment in internal marketing efforts and employee outcomes. The research employs a mixed-methods approach, including literature review, data analysis, and case study methodology. Key themes include the impact of internal marketing on employee motivation, ethical considerations, and strategies for enhancing employee loyalty and innovation. The findings offer recommendations for improving internal marketing practices within TESCO PLC and similar retail organizations, aiming to improve employee retention and overall organizational success. The dissertation also explores the challenges and issues related to internal marketing strategies and suggests ways to overcome them.