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SEO/AEO/GEO

Backlink

Inbound Link

Portrait of Robert Klimant, co-founder of Roelu Studio
Robert KlimantCo-founder

What is Backlink?

A backlink is a hyperlink from one website to another, also called an inbound link. In SEO, backlinks function as votes of confidence: when a credible site links to a page, search engines treat it as a signal that the page is useful or authoritative. Backlinks vary wildly in value — a link from The New York Times is worth more than a thousand from spammy directories — based on the linking site's authority and relevance.

Why it matters

Google's original ranking algorithm was built on backlinks. Twenty years and many updates later, they still carry serious weight. The catch is that quality has eclipsed quantity. One link from a real publication beats fifty paid mentions on link farms. The whole industry that grew up around buying, swapping, and faking backlinks has been slowly strangled by algorithm updates. What's left works: write something genuinely citation-worthy, do real PR, build real partnerships. It is harder than buying links and roughly a hundred times more durable.

How it works

When another site links to yours, search engines crawl that link, follow it, and pass some of the linking site's authority through. Not all backlinks count equally. Search engines weigh the linking domain's authority, the relevance of the linking page to your topic, the anchor text used, whether the link is followed or nofollowed, and whether it appears editorial or paid. Tools like Ahrefs and Semrush show your backlink profile and your competitors'. The goal is steady, organic growth — original research, customer stories, podcast appearances, useful tools others reference — not a sudden spike of suspicious links from unrelated domains.

Related terms

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