by victorsmith » Mon Apr 09, 2012 9:02 pm
t validates the HTML page if the html tags,attributes and other characteristics are up-to-date. If you have not known before, their are many versions of html, and I think that the most recent today is xhtml.
By validating the html pages,validators can see whether the pages' html properties are still suitable for what is allowed by the internet governing body W3C.