Web, domains and email
W3C
Abbreviation for World Wide Web Consortium
In short and in plain language
The W3C is a body from many countries that sets standards for the web.
For example, they cover how pages are built and styled. They also hold rules for web content without barriers.
Sites built to these standards usually look the same in different browsers.
Definition
The W3C is an international body that develops technical standards for the web, for example for HTML and CSS. These include the guidelines for accessible web content. Websites built to these standards are usually displayed consistently in different browsers.