World Wide Web Consortium (WC3). Is a group responsible for defining major standards used in web design, such as HTML and CSS.

W3C is the industries best practices in the production of your web site project. W3C compliance is one of the minimum requirements your web application or website should have and is one of the best values. Having an application or website developed with CSS and XHTML validation in mind means it will be a more accessible, powerful, and maintainable product. An added benefit of W3C compliance is increased market access - to mobile device users who can browse your site on their cellphones, PDA's, and other screen devices.