Web design is the visual and user interface of a website. Web designers are responsible for the layout and appearance of a website, including graphics, images, typography, and colors. Web design is an integral part of web development. It's one of the most important features that contribute to the success or failure of a website. The reason is that it's what visitors see when they first visit your site. It's what they judge your site by before they start clicking on your links or scrolling through your content.