If you've studied Search Engine Optimization, you've come across the term "backlink". Backlinks have become so important in the field of SEO, that they have become some of the main building blocks to good SEO. It is one of several criteria considered by search engines when crawling and driving traffic as well visitors to your site. Backlinks are links that are directed towards your site. Backlinks are known as Inbound links (IBL's). The number of inbound links is a sign of the popularity of that website. Backlinks are important for SEO because some search engines, especially Google, will give more credit to websites that have a good number of quality backlinks, and consider those websites more relevant than others in their SERPs for a search query.