A backlink — also called an inbound link — is created when another site links to yours. Search engines treat each backlink as a vote of confidence: the more authoritative and topically relevant the linking domain, the more weight that link carries when ranking your pages. Backlinks were the original PageRank signal and remain a core off-page factor today.
Why it matters
Backlinks are still one of the strongest off-page ranking signals Google uses. A handful of editorial links from relevant, authoritative domains will outrank hundreds of low-quality directory or comment links. They also contribute to E-E-A-T by demonstrating that recognised sources find your content useful enough to cite.
How to build them
- Earn links by publishing genuinely useful content, original research, free tools, or definitive guides others want to reference.
- Reach out to authors who already cite competitors with weaker resources and offer yours as an upgrade.
- Audit your backlink profile with Search Console; disavow obvious link-farm or paid-network domains that could trigger manual actions.
- Prefer relevance over raw domain authority — a link from a small niche blog can outperform one from a generic high-DA domain.
- Use a clean sitemap.xml and a clear canonical tag on every page so link equity consolidates on the URL you want to rank.
- Mark up authors and publications with structured data so the link source is machine-readable.