Glossary

Backlink

A hyperlink from one website pointing to another.

Definition

A backlink (also called an inbound link or external link) is a hyperlink on one website that points to a page on a different website. Backlinks are one of the most powerful ranking signals in Google's algorithm. Not all backlinks are equal: links from high-authority, relevant sites carry far more weight than links from low-quality or unrelated sites.

Why It Matters

Backlinks remain one of Google's top three ranking factors alongside content. A strong backlink profile — many links from diverse, authoritative, topic-relevant domains — is one of the clearest signals of a site's authority. Building backlinks through high-quality content, digital PR, guest posting, and partnerships is a core component of off-page SEO.

Examples

Editorial backlinkA major news site links to your research report naturally within an article

Guest post backlinkYou write an article for another site that includes a link back to your resource

Directory backlinkYour business is listed on a relevant industry directory

Toxic backlinkA spam site or link farm links to you (can be disavowed via Google Search Console)

Common Mistakes

Pursuing quantity over quality — 10 links from authoritative sites outweigh 1,000 from spam sites.

Ignoring relevance — a backlink from a related industry is worth far more than one from an unrelated niche.

Buying backlinks — this violates Google's guidelines.

Not monitoring your backlink profile for toxic links.

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Related Terms

Anchor Text

The clickable, visible text of a hyperlink.

Keyword Density

The percentage of times a keyword appears relative to the total word count.

Search Intent

The underlying goal or purpose behind a user's search query.

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