User Experience (UX) is the whole of a person’s impressions from using a site, app or product: how comfortably, quickly and intuitively they reach their goal. Good UX feeds straight through to conversions and loyalty, because the fewer obstacles in the way, the more people reach the end. It is more than looks: it covers structure, logic, speed and content, whereas the visual layer alone is UI. (Compare: UI, Conversion Rate Optimization (CRO))