UX design does not have an official, standard definition because apart from its various visual components, it encompasses information architecture, user research, wireframing and many elements that together decide the fate of UX. The closest to a definition of UX is the one provided by Nielsen and Norman which states that “User experience encompasses all aspects of the end-user’s interaction with the company, its services, and its products.” Thus, UX involves knowing what end-users want from a product or a system and meeting those requirements with perfection and in a way that delights them.
It is a design process that focuses upon the end-user. This is because a positive user experience leads to better user engagement, which in turn brings in more revenue.
