UI design must help you get the necessary information as fast as possible, without drawing unnecessary attention to its tools and means. The best UI design is invisible: it makes user’s interaction as simple as it can be, focus on usability and adapt to changing user needs.
User Interface (UI) is the visual layout of a page or screen you interact with, along with the means of this interaction. Web page design, monitor, keyboard, your smart phone screen – those are all elements of UI design. They provide people with the necessary tools to help them reach their goals.
For a customer, UI design is a simple map or a scheme that directs you towards your objectives. While for a developer it’s a complex visual system with strict rules and regulations.