XHTML validation

XHTML validation is a check on your source code whether your website passes the strict syntax of w3.org specification. w3 is the official organization trying to standardize the world wide web. The inventor of the internet Tim Burners - Lee is there. It is absolutely not necessary for your website to pass the XHTML validation process. In fact the most expensive website on the planet google.com does not pass XHTML validation. One of the most common difficulties of XHTML validation is that HTML and CSS codes are always changing and browser engines are also always changing. As long as your website appears to be fine, it should be good.