User Experience (UX)
The overall experience of a person using a product such as a website or computer application, especially in terms of how easy or pleasing it is to use.
Impact
Good UX reduces training costs and support calls.
Weinto take
UX is Functional, not just aesthetic. A beautiful button that doesn't submit is bad UX. A fast command-line interface (CLI) can be great UX for a developer. We design the experience appropriate for the user persona.