It is now well-known that Google and the other search engines use several factors to rank a website in the best possible way within the search results. One of these factors are backlinks: links hosted on a website that refer directly to another page. Therefore, it is essential to obtain many of them and of excellent quality. To do this, there are different link building strategies. Link building may initially seem complicated to understand and even more so to implement, but this article will explain in detail what link building is, how to best implement the different strategies and how to avoid damaging your website.