Open any SEO tool Ahrefs, SEMrush, Moz and you’ll see two numbers side by side: backlinks and referring domains. They look similar. They both talk about links. But if you treat them the same, you’ll miss one of the biggest levers in SEO.
In this article, I’ll break down the difference between referring domains and backlinks, why each matters, and how you can use them to strengthen your rankings. We’ll also cover practical steps you can take today, plus a quick comparison table for easy reference.
What’s a Backlink, Really?
A backlink is any hyperlink from another website that points to your site.
- If a blog links to your homepage, that’s one backlink.
- If the same blog links again to a blog post, that’s another backlink.
- Ten links from the same site? Ten backlinks.
Backlinking meaning in plain English: every clickable URL pointing to your site from another site is a backlink.
What Are Referring Domains?
A referring domain is the unique website sending those backlinks.
- If one site links to you ten times, you have 10 backlinks but only 1 referring domain.
- If ten different sites link to you once each, you have 10 backlinks and 10 referring domains.
Think of it like networking:
- Backlinks = conversations you’ve had.
- Referring domains = number of different people you’ve met.
Backlinks vs Referring Domains: Quick Comparison
Here’s a side-by-side look so you can see the difference at a glance:
| Feature | Backlinks | Referring Domains |
|---|---|---|
| Definition | Individual links pointing to your site | Unique websites that contain those backlinks |
| Example | 5 links from the same blog = 5 backlinks | But only 1 referring domain |
| Focus | Volume of links | Diversity of linking sites |
| SEO Impact | Shows depth (multiple links from same source) | Shows breadth (how many different sites trust you) |
| Google’s Preference | Valuable, but less powerful if from one site | More influential—Google values unique referrers |
| Analogy | Votes from the same person | Votes from different people |
Why Referring Domains Often Matter More
Google wants to see that multiple independent sites trust you not just one site linking over and over. That’s why referring domains are usually the stronger ranking signal.
But don’t dismiss backlinks completely. Multiple backlinks from the same domain can still help, especially if they:
- Link to different pages on your site (spreading authority).
- Come from a high-authority source.
- Drive referral traffic.
The sweet spot? A mix of both.
How to Check Referring Domains and Backlinks
Use any major SEO tool:
- Ahrefs Site Explorer: compare total backlinks vs referring domains.
- SEMrush Backlink Analytics: see new vs lost backlinks and domains.
- Moz Link Explorer: check linked domains with domain authority.
Pro tip: Don’t just check backlinks for your own domain. Look at your competitors’ top referring domains those are prime outreach targets.
6 Steps to Build a Healthy Backlink Profile
- Prioritize authority over volume. A single link from a trusted news site is worth more than dozens from low-quality blogs.
- Grow unique referring domains steadily. Set monthly goals (e.g., +10 referring domains). Small, consistent wins compound.
- Reclaim lost links. Use Ahrefs’ “Lost Backlinks” to fix broken or removed links.
- Focus on niche relevance. A backlink from an industry-relevant site carries more weight than a random directory.
- Encourage deep links. Ask sites that already link to you to link to more of your resources.
- Avoid spammy link farms. Google’s link spam updates punish unnatural link patterns.
Final Thoughts
Here’s the takeaway: backlinks show how many “votes” you’ve earned; referring domains show how many unique voters you have.
Both are essential. But if you want to grow authority and rankings, pay special attention to your referring domains. That’s the metric that tells Google you’re not just popular you’re trusted widely.
FAQs:
Which is more important: backlinks or referring domains?
Referring domains are usually more important for rankings. But backlinks still matter, especially from high-authority sites.
Do multiple backlinks from one domain help?
Yes. They add value particularly when they point to different pages but they won’t move the needle as much as a new domain.
What’s a good ratio of backlinks to referring domains?
There’s no perfect ratio, but if you have 10,000 backlinks and only 20 referring domains, that’s a red flag. Aim for steady growth in both.
How do I check backlinks for a domain?
Tools like Ahrefs, SEMrush, and Moz let you see total backlinks, unique referring domains, and even specific referring pages.
What’s the SEO backlinks meaning in practice?
It’s simple: backlinks are signals of trust, and referring domains show how broad that trust is. The stronger and more diverse the profile, the higher your authority.
