A linkback is a protocol of communication between websites which allows the blog writers and web publishers to be informed when other blog writers or web publishers link to their post, article and any other document.
When notified, the blog writer (or blog system) can keep track which articles are linking to his article. A common practice in blog culture is to add the links to those linking articles in the bottom of the article.
Over the years, 4 linkbacks have been developed by the blog systems. Refback, Trackback, pingback and webmentionIn the next parts , we will see the different linkbacks protocols and their properties: