How To Check Backlink Quality Before You Use Them

Straight answer: a backlink is only as good as the traffic it sends and the real audience reading the page it sits on, not the Domain Rating number a seller shows you in a screenshot. Before you use any backlink, check the linking page's organic traffic, its indexation status, its outbound link count, and whether it has ranked for anything real in the last twelve months. If it fails two of those four, walk away, no matter how impressive the domain looks.

The £600 link package that taught me this the hard way

Back in 2020 I had a client, a mid-size accounting firm, who'd already paid an agency for a "premium link building package" before they came to me. Fifteen links, £600, all sitting on sites with Domain Authority between 35 and 50. On paper it looked fine. I ran each one through a proper check and found that eleven of the fifteen linking pages had zero organic traffic, according to both Ahrefs and Semrush estimates. Not low traffic. Zero.

I dug into three of the domains using a reverse IP lookup and found they shared a hosting server with forty other sites, all with the same WordPress theme, all publishing the same generic "top 10" listicles with a suspicious number of finance and legal links stuffed into the middle paragraph. That's a private blog network, or PBN, and it's exactly the kind of thing Google's spam algorithms are built to catch. Six months later, four of those linking domains had vanished from Google's index entirely. The client's rankings didn't move an inch from any of it, which honestly was the good outcome. It could easily have gone the other way and pulled them into a manual action.

Why Domain Rating alone tells you almost nothing

Here's the bit most guides skate past because it upsets the tool vendors: Domain Rating (Ahrefs) and Domain Authority (Moz) are not Google metrics. Google has never confirmed using either one. They're proprietary scores built from link graphs, and link sellers game them constantly by buying cheap links into their own domain to inflate the number before flipping it to you at a markup. I've seen DR 55 domains with less monthly traffic than my local chip shop's website. A domain can have a high score and still be worth nothing, because the score measures how many links point at a site, not whether any human being ever reads it.

So treat DR or DA as a first filter, not a final answer. It tells you a site isn't brand new and has some link history. That's all.

The four checks that matter

1. Real organic traffic, not just a big number

Pull the domain, and specifically the exact page that will link to you, through Ahrefs Site Explorer or Semrush's domain overview. Look at organic traffic to the URL, not the whole domain. A site can get 50,000 visits a month to its homepage and none to the article your link sits inside. I reject anything under 100 estimated monthly visits to the specific linking page. That's a low bar deliberately, because even 100 real visitors beats 10,000 fabricated ones on a page nobody indexes.

2. Is the page even indexed?

Search site:domain.com/exact-page-url in Google. If it doesn't show up, the link has no value at all, full stop. Plenty of link networks publish pages, get your link live, take a screenshot for their invoice, then quietly deindex or delete the page a month later once payment clears. I check this again 60 and 90 days after the link goes live, because that's the window where the switch usually happens.

3. Outbound link count on that page

Open the page and count the outbound links in the body content. If there are more than 8 to 10 external links crammed into a single article, especially across unrelated industries (a plumbing link next to a crypto link next to a mattress link), that page is a link farm dressed up as content. Google's algorithms flag exactly this pattern, and it's spreading your link equity so thin it barely registers anyway.

4. Has it ranked for anything, ever?

In Ahrefs or Semrush, check the "organic keywords" tab for the domain. A site with a real editorial history will rank for dozens or hundreds of its own terms over time, even small ones. A site built purely to sell links often ranks for almost nothing except its own brand name, or for nothing at all. No keyword history usually means no real audience, which loops back to point one.

A quick five-minute audit you can run today

• Paste the linking domain into Ahrefs or Semrush and note DR/DA plus estimated monthly organic traffic
• Check the specific URL's organic traffic, not the domain total
• Run site:domain.com/the-page-url in Google to confirm it's indexed
• Count outbound links on the page and note whether the surrounding topics are relevant to yours
• Check the domain's organic keyword count and glance at what it ranks for
• Pull up the Wayback Machine and check the domain's history. Has it changed niche completely in the last two years? That's a classic sign of an expired domain bought and repurposed purely to sell links
• Look at the anchor text profile pointing at the domain overall. If it's overloaded with exact-match commercial phrases like "best cheap insurance quotes", that's a domain built for manipulation, not readers

Run through that list on ten prospective links and you'll usually find that only three or four survive. That's normal. It's also exactly why I tell clients that how many backlinks you need to rank is the wrong first question. Ten checked, genuine, relevant links beat fifty unchecked ones every time, and they're far less likely to get you into trouble later.

The uncomfortable bit nobody wants to say out loud

Most "quality checklists" floating around, including a fair few I've seen from big-name SEO blogs, were written for a version of the link market that doesn't exist any more. They tell you to look for high DR, relevant niche, and a "natural" anchor text ratio. Link sellers read those same checklists and now build sites specifically designed to pass them. I've seen PBNs with carefully varied anchor text, plausible niche relevance, and DR scores in the 40s built purely to survive exactly the checks everyone recommends. The checklist has become the target, not the filter.

The only things that are hard to fake at scale are real traffic and real indexation over time, because both require an actual audience showing up, and audiences don't show up for content nobody wanted to read in the first place. That's why traffic and indexation history sit at the top of my list, not DR, not anchor text, not "niche relevance." Fake everything else. Real visitors are expensive and slow to fake, which is exactly why they're the strongest signal you have.

When free links are the safer bet anyway

If you're buying links to shortcut the process, you're often taking on more risk than the link is worth. There's a decent amount you can get without paying anyone, through guest posts on sites you've engaged with, through HARO-style journalist requests, through partnerships and supplier pages. I've put together a working list of exactly where I go for this in where you can get backlinks for free, and a wider set of live opportunities in free backlink opportunities. Neither route needs the vetting checklist above, because you already know the site and how it operates, which is the whole point.

If you're building your own backlink strategy from scratch rather than checking links someone else is trying to sell you, the fuller process, including outreach templates and timelines, is in how to build backlinks for your business site.

What to do once you've picked a link

Once you've cleared a link and it goes live, check that it's set up correctly. I still see links added as plain text with no href, or with the wrong anchor wrapped incorrectly in the HTML, which means it passes no value at all despite looking fine to a human reader. If you're the one placing links on your own site for a partner or contributor, the exact code and the common mistakes are covered in how to add a backlink using HTML correctly.

Then track it. Set a calendar reminder for 30, 60 and 90 days out to recheck indexation and traffic on that specific page. Links get deleted, deindexed, or quietly stripped more often than people expect, and the only way you'll know is if you look.

How many good links is enough

Clients often ask me how many of these vetted links they need before rankings move. There's no fixed number, it depends heavily on competition and current authority, but I've laid out realistic ranges by site age and niche in how many backlinks a website should realistically have in 2026. The short version is that quality reduces the quantity you need. Ten checked, relevant, indexed links from real sites with genuine traffic will usually outperform sixty unchecked ones, and they won't put your site at risk of a manual penalty a year later.

For a quick check, run it through my free backlink checker.

Frequently asked questions

Is a link from a high Domain Rating site always good quality?

No. Domain Rating measures link volume pointing at a domain, not whether real people visit it or whether Google trusts it. I've seen DR 50+ sites with zero organic traffic and pages that were never indexed. Always check actual organic traffic to the specific linking page, not just the domain's headline score.

How can I tell if a backlink is from a private blog network (PBN)?

Run a reverse IP lookup on the domain, check the Wayback Machine for sudden niche changes, and look at the site's design and content pattern. Multiple domains sharing a server, the same theme, and generic listicle content with commercial links stuffed in the middle are classic PBN signs.

Should I check a backlink again after it's already live?

Yes, and most people skip this. Recheck the specific URL at 30, 60 and 90 days to confirm it's still indexed and hasn't been deleted. Link sellers sometimes remove or deindex pages once payment clears, which means the link stops passing any value even though your invoice says otherwise.

What's the single fastest check to reject a bad backlink offer?

Search site:domain.com/the-exact-page-url in Google. If it's not indexed, the link is worthless regardless of how good the rest of the site looks. This one search takes ten seconds and eliminates a surprising number of low-quality offers immediately.