Core concepts
Backlink
A link from another website to yours. Backlinks remain a core ranking signal, weighted by the linking site's relevance and authority.
By Shimon Carroll, Founder, SEO for AI Agents · Last updated
A backlink is a hyperlink from one site to another. Links have been a core ranking signal since PageRank, the idea that a link is a vote of confidence, and they remain important, though their weight is now heavily mediated by quality. Not all backlinks are equal: a link from a relevant, authoritative, editorially-chosen source carries far more value than a link from a low-quality directory, and links from spammy or manipulative sources can be ignored or, in egregious cases, hurt.
What matters in 2026 is earned over built. A backlink that exists because someone genuinely found your content worth citing, original research, a useful tool, a definitive guide, is the kind that compounds. Links manufactured through schemes, paid placements without disclosure, link exchanges, private blog networks, are against Google's policies and increasingly worthless or harmful. The most durable link-building is digital PR and content worth linking to, not outreach for its own sake.
Google has also softened its stance on disavowing: John Mueller has repeatedly said most sites should not bother with the disavow tool, because Google is good at ignoring bad links, and that disavowing should be reserved for cases of a manual action or a known unnatural-link problem. The honest framing is that links still matter, but the path to good ones is being genuinely citation-worthy, the same property that earns AI citations. We assess link profile health alongside the on-site signals.
Related terms
Primary sources
- Google Search Central, link spam policies
Google Search Central