This chapter explores the core dimensions of service quality and their critical role in shaping customer satisfaction, brand perception, and organizational success. Unlike tangible products, services rely heavily on interpersonal interactions and intangible attributes that customers experience throughout the service delivery process. This chapter analyzes key service dimensions, reliability, responsiveness, assurance, empathy, tangibility, and ease-of-use, and illustrates how they influence perceptions of quality. Drawing from examples in the hospitality, retail, and transportation sectors, the chapter emphasizes how companies like Nordstrom, Zappos, and Ritz-Carlton achieve excellence by aligning operations with service quality expectations. By mastering these dimensions, organizations can enhance customer loyalty, differentiate themselves in competitive markets, and build lasting value through superior service experiences.