This report presents a comprehensive case study of ASDA, a major player in the UK grocery retail sector, focusing on the intricate relationship between service quality and customer loyalty. The research delves into the key attributes of customer loyalty, assessing how various aspects of service quality directly impact customer retention and satisfaction. The study employs a descriptive research design, utilizing a deductive approach and quantitative research methods to analyze data collected from a sample of 30 customers. The methodology includes a literature review, research questions, and a discussion of validity and reliability. The report aims to investigate the influence of service quality on customer loyalty, identify key factors associated with customer loyalty, and analyze the attributes of service quality and its consequences, ultimately providing recommendations to enhance customer loyalty within ASDA and the broader grocery retail industry. The research incorporates insights from various academic sources and provides a detailed analysis of the factors influencing customer loyalty in the competitive retail market.