A link from somewhere else on the web to your site is called an inbound link or a backlink. If you didn’t have to ask for it, it is the best kind, because it is an indication that you are doing a good job placing quality content on your site. The number of quality inbound links to your website is what gives it “authority” on the web. An authoritative site is one that has information you can trust and rely upon. Now you see the goal: building quality backlinks to your site to gain authority. It’s not just the number of links that are important: it’s the quality and reputation of the websites that link to you that really counts.