The Tweet Button is a small widget which allows visitors to share content and connect on Twitter.
With the embedded video player you can easily add Facebook videos and Facebook live videos to your website.
This site uses the viewport meta tag which means the content may be optimized for mobile content.
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