W3C is an acronym for World Wide Web Consortium.

The W3C was founded 1994 in the USA develops and regulates the worldwide web (incl. HTML and XML. Its goal is to unify the technical specifications and it's composed of

research institutes and IT companies.

A W3C validated website will be displayed correctly in up-to-date browsers. Analyze your website to make sure there are no problems with your source code (e.g. remove empty tags and store

JavaScript in external files). This will render the website correctly, improve the loading time and is crawler- and user-friendly.