Isabella Di Fabio Web Design and Development The difference between web design and web development is somewhat blurred, as "web design" has become a generic term encompassing design and development. Isabella Di Fabio - It is important for companies to make their customers aware that a successful website requires excellent design and development. Web design determines the appearance and perception of a website. It includes the design, navigation and color gamut of the website. It also includes graphic and logo design. Web design has more to do with aesthetics and user experience than with functions. A web designer will make a website easy to use and fit the purpose for which it was created.