Unfortunately, these two terms are frequently mistaken as interchangeable ways to refer to the customer-facing design of a website. However, this is not the case as there are some distinct differences between these two practices. While both UI (user interface) and UX (user experience) impact the way a customer experiences your site, UI manages the more obvious design elements and presentation of the pages. UX, on the other hand, looks at how visitors interact with your site and how easy it is for them to perform certain actions. Clearly, UI and UX are closely linked but these subtle differences in responsibilities are notable.