UX

In commerce, user experience (UX) is a person's emotions and attitudes about using a particular product, system or service. It includes the practical, experiential, affective, meaningful and valuable aspects of human–computer interaction and product ownership. Additionally, it includes a person's perceptions of system aspects such as utility, ease of use and efficiency. User experience may be subjective in nature to the degree that it is about individual perception and thought with respect to a system. User experience varies dynamically, constantly modifying over time due to changing usage circumstances and to changes to individual systems as well as to the wider usage context in which they operate. In the end, user experience is about how a user interacts with, and experiences, a product.