What is an external link?
An external link is a link that leaves your domain. From your side it is an outbound link: a citation, a reference, a credit, a partner's site. From the other side the same link is an inbound link or backlink. The term is defined by the crossing of domains; a link from one page on riot.nyc to another page on riot.nyc is internal, a link to anywhere else is external.
External links are the structure of the web, the thing search engines were built to follow. How you link out, and how others link to you, are two halves of the same signal.
Why it matters
Why an external link matters
Linking out matters for readers first. A page that cites its sources, credits its collaborators and points to the best resource on a subject is more useful and more credible than one that keeps every visitor trapped. Google has said that linking to relevant, reputable sources is a normal part of good content and does not cost you ranking; the old fear that outbound links leak authority has been answered.
Links in the other direction matter more. External links pointing to you are the main way the web vouches for your site, and earning them from relevant, trusted domains is what most of off-page SEO is about. The two halves are related: sites that link generously tend to be the sites that get linked to.
In practice
How an external link works in practice
- 01
When you link out, link to primary sources and the best available page, use anchor text that says what the reader will find, and mark the links that are not endorsements. Paid or sponsored links take rel="sponsored"; links in comments or user content take rel="ugc"; anything else you do not vouch for takes rel="nofollow". If a link opens in a new tab, add rel="noopener" so the new page cannot reach back into yours.
- 02
Then maintain them. External pages move and vanish, and a page full of dead links reads as abandoned to a visitor and a crawler alike. Crawl the site a few times a year for broken outbound links and fix or remove them. On the inbound side, review the links pointing at you in Search Console and a backlink tool, reclaim mentions that do not link, and keep the pages people link to alive or redirected, because a link to a 404 is a vote thrown away.
Watch out
What people get wrong about external links
Hoarding. Some sites nofollow every outbound link or refuse to link out at all, on the theory that authority is a liquid that escapes. It is not, and the result is content that cannot cite anything and looks it. The opposite error is careless linking: outbound links to spam, to paid partners without the sponsored attribute, or to pages that have since become something else. Every link you publish is a small statement about your judgment, and search engines read it that way.
