У вашего броузера проблема в совместимости с HTML5
"What is SEO?"
SEO is the process of getting your website "found" in the Google Search Engine based on the products or services your website offers.
Website Architecture,Keyword Research, Image Size, Load Speed, External Links, RSS Feeds Meta Tags, and XML Sitemaps are all factors in optimizing your website design for high rankings in the Google SERP's.
http://ynottony.com/ynot/seo-consultant/google-search-engine/