This document discusses user experience (UX) metrics that can be used to evaluate a product or service. It identifies several types of metrics that provide both quantitative and qualitative insights. Quantitative metrics include customer satisfaction indexes, success rates of critical tasks, and person-product love scores. Qualitative research includes design ethnography, concept validation, and trend research. The document provides examples of specific metrics like completion rates and questionnaires. It also suggests that companies define critical tasks, map the user experience, and identify when to test metrics like customer satisfaction indexes.