What is Webdesign?

Web design is the design of web pages, websites and web applications. The term also refers to web-based graphical user interface (GUI) design using images, CSS, and one of the HTML standards.

Some people distinguish between "web design" (the graphics and user interface design) and web development, which includes "web design" as well as web server configuration, writing web applications, dealing with security issues, etc.

From a great resource: Wikipedia (link: http://en.wikipedia.org/wiki/Website_Design)