UX & UI are crucial to a digital product and work closely together. UI design represents the cosmetics of the body–its presentation, its senses and reactions. Think of it as the approach an architect takes when thinking about the UX of a new custom-built house. The way the house flows, the size of the rooms and the proximity of certain rooms are to each other. Good UX/UI Design means the user will never leave your app because they are confused or not enjoying the brand experience.