A link from another website to yours, treated as a signal of trust and relevance.
A backlink is an inbound hyperlink from one website to another. Search engines treat links as endorsements: a link from a relevant, trusted site passes authority and can help the target page rank. Backlinks remain one of the strongest ranking factors, though quality and relevance now matter far more than raw count.
Not all backlinks are equal. A single editorial link from an authoritative, topically relevant site is worth more than hundreds of low-quality directory or spam links, which can actively harm you.
The value of a link depends on the linking site’s authority and topical relevance, where the link sits on the page, and the anchor text used. A followed, in-content link from a relevant industry publication is the gold standard.
Buying links in bulk, chasing high domain rating alone while ignoring relevance, or building unnatural exact-match anchor patterns. These trigger Google’s spam systems and can lead to manual actions or algorithmic suppression.
Backlinks remain one of Google's strongest ranking signals because they are hard to fake at scale and function as votes of confidence — a link from a trusted, relevant site passes authority (historically "PageRank") and signals that your content is worth referencing. But the model is emphatically quality over quantity: a handful of links from authoritative, topically-relevant sites outweighs thousands of low-quality ones, and manipulative link schemes are a direct violation that can trigger algorithmic suppression or a manual penalty. The goal is a natural, diverse, editorially-earned profile.
Not all backlinks are equal. Value rises with the linking site's authority and topical relevance, and with the link being editorially placed (given because the content deserved it) rather than paid, exchanged or self-created. A dofollow link in the main body of a relevant, high-authority page is worth far more than a nofollowed footer link from an unrelated site. Anchor text matters too — natural, varied anchors are healthy, while over-optimised exact-match anchors at scale look manufactured and risk suppression.
Two competing sites illustrate quality over quantity. Site A has 5,000 backlinks, almost all from unrelated directories, comment sections and a private blog network — a profile with a manipulative footprint and little topical relevance. Site B has 40 backlinks, but they come from respected industry publications, a university resource page and a handful of genuinely relevant blogs, every one editorially given. Site B outranks Site A across their shared keywords, and when a core update lands, Site A's rankings fall further as its low-quality links are discounted while Site B is untouched. The example captures the modern reality of link building: a small profile of authoritative, relevant, editorially-earned links beats a large profile of manufactured ones, and only the former survives algorithm updates. Pursue relevance and genuine endorsement, not counts.
Part of our defined terms knowledge graph — browse every entry in this branch.
A third-party score estimating the strength of a domain’s backlink profile.
The visible, clickable words in a hyperlink, used as a relevance signal.
Links between pages on your own site, used to spread authority and context.
An HTML hint that tells search engines which URL is the master version of a page.
The gradual loss of traffic and rankings a page suffers as it ages and the SERP moves on.
Common questions
Straight answers on how this fits your marketing and build.
Still have questions? Talk to a specialist