VigLink turns ordinary links into ordinary links that earn money. VigLink works with over 30,000 advertisers and retailers to monetize links. They convert existing links into monetized links or insert new, revenue-generating links. User experience remains largely unaffected. Clicks that turn into sales earn a commission. Typi...
A pingback is one of four types of linkback methods for Web authors to request notification when somebody links to one of their documents. This enables authors to keep track of who is linking to, or referring to their articles.
Open graph description entity tag
The Open Graph protocol enables any web page to become a rich object in a social graph, a open protocol supported by Facebook
Sites who has this tag are verfied by google to use WebMaster tools
A canonical link element is an HTML element that helps webmasters prevent duplicate content issues by specifying the "canonical", or "preferred".