Hi everybody, I have website http://www.imageonline.co.in/aboutus.php, i have tried validating the above mentioned url with http://validator.w3.org/check but getting following errors with meta tags :- <meta property="fb:admins" content="1142082696" /> <meta property="fbage_id" content="180141562007664" /> <meta name="revisit-after" content="7 days" /> <meta name="document-classification" content="Internet Services" /> <meta name="document-distribution" content="Global" /> Can anyone help me out how i can solve these errors successfully.