RDFa EAn HTML5 extension that supports joined knowledge by introducing HTML tag attributes that correspond on the person-seen material that you'd like to explain for search engines Thank you for describing this kind of tough topic in these a simple way. I figured out so many things about Search engine https://what-are-on-page-seo-tech81003.blogsvirals.com/18886230/what-is-on-page-seo-checklist-secrets