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Backlink strategy

Referring Domains: Why Source Diversity Matters

A referring domain is a website that links to you. Counting unique sources can be more informative than counting every individual backlink.

Editorially reviewed • Updated September 14, 2026

Backlinks vs referring domains

One site can generate many links, so backlink count alone can exaggerate source diversity.

Quality still matters

Ten irrelevant domains are not automatically better than three strong, relevant publications.

Look at concentration

If most links come from one network or a small group of similar sites, inspect the pattern carefully.

Use the metric comparatively

Referring-domain trends can help you compare pages, competitors and campaign progress.

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