Link building refers to the practice of systematically building “link relationships” for a specific website or network of websites. Link building is a key part of search engine optimization, because Google and other search engines count the number and the quality of all inbound links pointing to your website, and this is a key factor in how highly you rank compared to the websites of your competition. There are many ways to conduct link building campaigns, but one of the most important is to create link bait content.