The Link Building is one of the foundations of web positioning or SEO, which seeks to increase the authority of a page as much as possible by generating links to it.
The algorithms of most search engines such as Google or Bing are based on SEO factors on-site and SEO off-site, the latter based on the relevance of a website, whose main indicator are the links that point or backlinks. There are other factors, such as the anchor text of the link, if the link is followed or not.
It is important to keep in mind that good content is often linked in a natural way, so the effort to get links happens organically and with less effort than in other ways. Here I am providing the top 100 Link building websites to improve the positioning of your website.