The World Wide Web (WWW) is an information space where documents and other web resources are identified by URLs, interlinked by hypertext links, and can be accessed via the Internet.[1] The World Wide Web was invented by English scientist Tim Berners-Lee in 1989. He wrote the first web browser in 1990 while employed at CERN in Switzerland.[2][3] It has become known simply as the Web. When used attributively (as in web page, web browser, website, web server, web traffic, web search, web user, web technology, etc.) it is invariably written in lower case. Otherwise the initial capital is often retained (‘the Web’), but lower case is becoming increasingly common (‘the web’).

The World Wide Web was central to the development of the Information Age and is the primary tool billions of people use to interact on the Internet.[4][5][6] Web pages are primarily text documents formatted and annotated with Hypertext Markup Language (HTML). In addition to formatted text, web pages may contain images, video, and software components that are rendered in the user's web browser as coherent pages of multimedia content. Embedded hyperlinks permit users to navigate between web pages. Multiple web pages with a common theme, a common domain name, or both, may be called a website. Website content can largely be provided by the publisher, or interactive where users contribute content or the content depends upon the user or their actions. Websites may be mostly informative, primarily for entertainment, or largely for commercial, governmental, or non-governmental organizational purposes