Most SEO practitioners weight referring domain count more heavily than raw backlink count, since ten links from ten different genuinely independent, relevant websites generally represent stronger, more diverse authority than a hundred links all from one single site (which is easy to manufacture and carries a real risk of looking manipulative if the pattern is too consistent or too large relative to the site's overall size). Evaluating referring domain quality goes beyond the raw count — factors like each domain's own authority, topical relevance to the linked site, and whether the domains look genuinely independent (not all owned or operated by the same entity) all factor into how much real value a growing referring-domain count actually represents.
Example
A site's total backlink count jumps from 500 to 5,000 in a month, but its unique referring domain count barely moves — a red flag suggesting the new links are concentrated on a small number of sites rather than genuinely diverse authority growth.
Related terms
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