The world wide web consists of several things, and links between those parts are indispensable. If a piece of content isn’t linked to, how would search engines know how to find it? Let alone visitors, they would never get there. So, links are needed for an interconnected web. Links are either internal or external. An external link is a link between two separate websites. Links within a website are called internal links. Those are very important for site structure and SEO too, but that’s a different check. The outbound links checker assesses links that are external, so between websites. There are two types of external links: