A Kano questionnaire is a research tool used to measure customer satisfaction and identify the features and attributes of a product or service that are most important to consumers. Developed by Japanese researcher Noriaki Kano, this questionnaire utilizes a unique approach to categorize customer needs and preferences into five distinct categories: must-be, one-dimensional, attractive, indifferent, and reverse. By understanding these categories, businesses can prioritize their efforts and resources to deliver products and services that not only meet but exceed customer expectations, ultimately leading to increased customer loyalty and business success.