Webdesign as a discipline of media design comprises the visual, functional and structural design of websites for the Internet. The technical implementation of websites, on the other hand, is called web development. The visual perception of websites on the Internet is fundamentally dependent on the general principles of visual communication. The process of information acquisition by the user / visitor is significantly influenced by the graphic design of the website. In addition to the professional transport of information and corporate identity, the design of websites is about usability. The content offered should be accessible to as many people as possible in the interests of accessibility. This includes both the support of various web browsers and z. B. mobile devices (smartphones, tablets, etc.), the offer of alternatives to media content and the support of users with special input methods. The practical implementation of these principles can often require more technical and creative effort. The regulation for the creation of barrier-free information technology according to the Disability Equality Act as well as international guidelines (e.g. the WCAG or Design for All) apply. An important aspect of web design is correct text markup and knowledge of web typography. Due to the fact that the resolutions of screens are currently much lower than in print media, special fonts that are optimized for display on the screen are often used. While web pages for the browser generations 4 (Netscape 4 and Internet Explorer 4) were still written very differently and browser switches were required, the web developer in the current versions (Mozilla Firefox, Internet Explorer, Opera, Konqueror etc.) can do a more or less Expect extensive support for the standards of the W3C.