Link Building
Referring Domain
Quick definition
A referring domain is any unique website that points at least one backlink to your site.
Referring domains are counted at the root-domain level. Ten backlinks from the same site count as one referring domain — a much weaker signal than ten backlinks from ten different domains.
Why Referring Domain matters
Growth in unique referring domains is the most important link-building KPI for most SaaS SEO programs. It directly correlates with organic ranking improvements over time.
How Referring Domain works in practice
Focus campaigns on broadening your referring-domain footprint rather than stacking placements on a handful of friendly sites. A diverse, growing referring-domain set is harder to fake and more valuable to Google.