A unique website that links to yours at least once, counted separately from the total number of backlinks.
ID
SS-DF-122
Confidence
High · 88
Evidence
Strong
Updated
2026-07-08
Definition
A unique website that links to yours at least once, counted separately from the total number of backlinks.
A referring domain is any distinct domain that carries one or more backlinks to your site. Because many links from a single domain provide diminishing returns, the count of unique referring domains is often a stronger indicator of link authority than raw backlink volume. Growing the diversity of relevant, trustworthy referring domains is usually more valuable than accumulating repeated links from the same few sources.