W3C and HTML and CSS

W3C is an international community that works together to develop Web standards; protocols and guidelines that ensure the long-term growth for the Web. W3C defines the key parts that make the World Wide Web work.

HTML example

CSS example

HTML and CSS are the core technologies used for building Web pages. HTML provides the structure and content of the page, while CSS provides the visual and aural layout. Together they are the basis of building Web pages and apps.

Together, W3C, HTML, and CSS create the basis for web pages and protocols on the Internet.