Web development is a broad term that incorporates all areas of developing a web site for the World Wide Web. This can include graphical web design, actual coding of pages, backend programming, and web server configuration. However, among web professionals, web development usually refers only to the non-design aspects of building web sites, e.g. writing markup and coding.
For larger businesses and organizations, web development teams can consist of hundreds of people, while smaller organizations may only require a single webmaster.