Google Publisher Tag (GPT) is an ad tagging library with which you can dynamically build ad requests. GPT takes key details from you such as ad unit name, ad size, and custom targeting, builds the request, and displays the ad on web pages or mobile apps.
Sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development.
Identifies administrators for a page which will be able publish data to your wall if you like any content within this page.
Google+ platform websites integration using the Google+ platform tag.
Open graph description entity tag
Sites who has this tag are verfied by google to use WebMaster tools
By adding rel="home" to a hyperlink, a page indicates that the destination of that hyperlink is the homepage of the site in which the current page appears.