Deep linking is the process of using a hyperlink that leads to an indexed page of some other website. At this point, you might wonder why its called deep! This is because rather than linking to the homepage of a specific website, deep linking leads to a page thats below the top page in the websites hierarchy. Deep linking can have a great impact on not only the search engine ranking of the linked page but also of the whole website. That is the reason why this practice is one of the most important parts of SEO (search engine optimization).