What is UX/UI Design?
UI/UX design is the design of any user interfaces in which ease of use is as important as the interface. UX is a User Experience, this is what the experience / impression the user receives from working with your interface (Whether he is able to achieve the goal and how easy or difficult he can do this).
UI design – this is the whole look of interface, namely its color, compositions and other.
UX designer, will rather develop steps that the user will take to use web product. Then the project goes to the UI designer, who improves these interactions by adding color and emphasizing the original design.