User experience, often abbreviated to UX, is an assessment of the feelings towards a particular system or application by an end-user. UX is considered within the development of products to ensure the expectations of end-users are met.
UX is a clever system that studies the behaviour, perceptions, reactions and emotions that occur within users when using the product. UX concerns the visual appearance of the system, as well as its usability and efficiency in completing tasks. Software such as the User Acceptance Test (UAT) is used to evaluate the user experience in reviews.