Service quality is defined as meeting or exceeding customer expectations through high performance. SERVQUAL is a framework for measuring service quality across five dimensions: reliability, responsiveness, assurance, empathy and tangibles. There are five gaps between customer expectations and perceptions: 1) manager vs customer expectations, 2) standards vs expectations, 3) delivery vs standards, 4) promises vs delivery, 5) perceptions vs expectations. Strategies to close the gaps include improving communication between managers and customers, setting appropriate quality standards, ensuring delivery meets standards, aligning promises with capabilities, and consistently meeting expectations. Effective customer feedback uses a mix of tools to assess satisfaction, drive improvements and create a customer-centric culture.