Backlinks are one of the essential things in search engine optimization (SEO). A backlink is simply a link coming from another website back to your website. A backlink can be a simple text link, an image link, a video link, or a hyperlinked object on another website. The exact purpose of backlinks varies greatly depending on the website’s goals, such as a specific product review. For that example, an image link would be more beneficial than a text link.