Technical Definition
A referring domain is a unique domain linking to your website. One domain can have many linking pages, but counts as one referring domain. Diversity of referring domains is generally more valuable than many links from the same domain. Tracked in tools like Ahrefs and Semrush. Key metric for link profile health.
Simple Explanation (ELI13)
A referring domain is a website that links to you. If one blog links to you from 50 different articles, that's still just one referring domain. Having links from many different websites is usually better than lots of links from the same site. It shows your site is recognized across the web.
Related Terms
Backlink, Domain Authority, Link Profile, Link Diversity
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