Definition

What Is a Backlink in SEO?

A hyperlink from an external website pointing to your website. A key SEO signal — high-quality backlinks from authoritative sites improve domain authority and rankings.

Related Terms

SEO

Domain Authority

Internal Linking

Anchor Text

Content Strategy

Example

A TechCrunch article mentions Reload Mode and links to reloadmode.com — this is a high-authority backlink that positively signals SEO trust.

The number of referring domains (unique websites linking to a page) is the single strongest predictor of Google rankings — pages ranking in position 1 have an average of 3.8x more backlinks than pages ranking in positions 2–10, according to Backlinko's analysis of 11.8 million Google search results.

Synonyms:

Inbound link, External link

Acronyms:

-

What it applies to

Every website that wants to rank for competitive keywords. Backlinks are the primary off-page SEO signal — without them, even excellent on-page optimisation has limited ranking potential.

How to earn backlinks

  • Create linkable assets: Original research, industry data reports, comprehensive guides, and free tools are the most consistently linked types of content. They attract links because they are genuinely useful and reference-worthy.
  • Digital PR: Create a newsworthy angle — a survey, a data study, a contrarian point of view — and pitch it to journalists and publications your ICP reads. A single placement in a high-authority publication can earn 10–50 backlinks.
  • Guest contributions: Write expert contributions for industry blogs and publications. The author bio link counts as a backlink.
  • Broken link building: Use Ahrefs to find broken links on relevant websites, create replacement content on your own site, and contact the webmaster with the replacement URL.

How to monitor backlinks

Use Ahrefs, SEMrush, or Moz Link Explorer to track new and lost backlinks. Set up email alerts for new referring domains. Monitor for toxic backlinks — low-quality or spammy sites — and disavow them via Google Search Console's Disavow tool if they appear manipulative.

Backlink: Common Questions Answered

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