What is Backlink SEO ??? in simple words “An anchor link in a blog/website which is pointing to another blog/website is called backlink“. Its a simple link which can be found in the blog post, sidebar, header, footer or even comments. No matter where it is, if it is pointing to an external website then it is a Backlink of that website. Backlinks are also known as Referrers. Backlinks are also used to increase the Page Rank of a blog.