What is a Backlink? What's all this hoopla more than backlinks? Every SEO forum plus blog you stop by is constantly touting the power and necessity of back links they must be a pretty big deal! So what exactly is a backlink? Simply put, the backlink is a link on another website (external) that leads to a web page on your website. For instance, a link with this page to a page on one more website would be a backlink for THAT webpage.