In simple words, UI Design services stand for graphical layout of an application — the design of every button, window, image, entry field, but also all website or app transitions and interactions. The goal of UI Design services is to build your brand awareness, improve user interactions and as a result, boost the customers' satisfaction with your product. By building a design system or a style guide, you can also improve your product's scalability potential and extend your product quicker, reducing the time spent on building new elements. The main guidelines are already there, so the hired designers can jump on the project quicker and do not need to stretch resources even for a small change.