In addition to useful content, backlinks are one of the most important factors for the search engine ranking. A website with the most valuable backlinks is usually displayed on top of the search results, especially when we are talking about very competitive areas. Google itself has confirmed several times that backlinks are among the most important ranking factors next to content and user behavior (RankBrain). Since backlinks represent important recommendations of other websites, they directly affect the reputation and importance of a website for search engines. Links are an important factor in online marketing not only as a ranking criterion but also as a good traffic source for targeted visitors from other websites.