User experience (UX) is how a person feels when interacting with a product or application. As a UX designer we study and evaluate how users feel about a product, looking at such things as usefulness, usability, design and efficiency of performing a tasks and so forth.
The more complex the product/application, the more involved will the planning and architecture have to be for it. While investing in a full-blown multi-member UX designers for a simple static website seems over the top, multi-faceted websites, interaction-rich Web applications and e-commerce websites stand to benefit a lot from UX design.
UX design is not a “one size fits all”. It won’t work in every situation for every user because – we are all different. The best is to design for specific experiences and promote certain behaviours. User experiences will be different between websites. a design must be tailored to the goals, values, production process and products of its website.