Judging a link
High Quality Backlinks: What Makes a Link Worth Having, and How to Spot a Fake
The email promises a guest post on a DA 62 site for $85, delivered in five days. The site publishes articles about crypto, kitchen remodels and cat food on the same afternoon, and nobody has read any of them. That is a high number on a low-quality link, and telling the two apart is the whole skill.
October 21, 2026 · 11 min read
The short answer
A high quality backlink comes from a site your customers would recognize, on a page people actually read, placed there because an editor or owner chose to link to you. Relevance, real traffic and editorial placement matter more than any score. Third-party metrics like Domain Authority and Domain Rating are vendor estimates, useful for comparing sites but not for judging a single link.
On this page
- Four questions that sort good links from bad ones
- Relevance: would your customer recognize the site?
- Real traffic: the test the link sellers skip
- Editorial placement: where the link sits, and who put it there
- DA, DR and Authority Score: useful rulers, terrible targets
- Link farms, PBNs and the sites built to sell links
- A five-minute scorecard before you chase any link
- Where high quality links come from, and getting help earning them
Four questions that sort good links from bad ones
Link sellers like to grade links with a single number because a single number is easy to sell. A link worth having passes four plainer tests, and you can run all of them in about five minutes with a browser and a little skepticism.
Is it relevant?
Does the linking site serve the same customers, the same trade or the same place as you? A plumbing supplier, a home inspector's blog, the city's business guide: yes. A general news site that sells posts on every subject: no.
Does anyone read it?
Does the site get visitors from search, and would anyone click your link? A page nobody visits passes nobody to you.
Who chose the link?
Did an editor, owner or writer decide your page deserved it, or did you place it, pay for it or swap for it? Google's spam policies turn on that question.
Will it last?
Is this a real organization likely to be around next year, or a site built last month on a recycled domain?
Pass all four and you have a link that helps with search, sends customers and carries no risk. Fail the third and nothing else matters. Our link building hub explains how links fit into search overall; this guide is about judging one link at a time.
Relevance: would your customer recognize the site?
Google's link documentation describes links as a signal of how relevant pages are, and wants link text that relates to both the page it sits on and the page it points to. Relevance therefore runs in two directions. The site should have a reason to talk about a business like yours, and the sentence around the link should make sense to a reader.
For a local business, relevance comes in three flavors. Topical: a roofing supplier linking a roofer. Local: the chamber, the neighborhood association or the local paper linking a business in town. Relational: a partner who refers customers linking a business they trust. A link that has none of the three is a stranger's recommendation, and both readers and search engines discount strangers.
Relevance also explains why anchor text should be left to the linking site. A link reading your business name, or the editor's own description, looks like what it is. Dozens of links reading "best HVAC repair Austin" look like what they are too.
Real traffic: the test the link sellers skip
A link on a page that real people visit can send you customers on its own, whatever it does for rankings. A link on a page with no readers can only ever be a ranking play, and the sites built purely for ranking plays are the ones Google's systems are designed to catch. So the simplest quality check is whether the site has an audience.
The tool vendors say the same. Ahrefs, whose Domain Rating is one of the most quoted link scores, advises in its own help article on DR that you should never judge a site's quality on site-wide authority alone, and lists whether the site gets any organic traffic among the things to check. Semrush builds an estimate of organic traffic into its own Authority Score, and treats a mismatch between a site's links and its traffic as a sign of manipulation.
- Check estimated organic traffic in any SEO tool you have, and look at the trend, not one month. A site whose traffic fell off a cliff last year may have been hit for selling links.
- Look at which searches bring the traffic. A local news site ranking for local news is healthy. A site ranking only for odd phrases unrelated to its content is not.
- Read the comments and social shares. Real publications have readers who respond. Link farms have silence.
- After you earn the link, check GA4. Referral visits from the site are the best proof it was worth earning.
Traffic estimates from third-party tools are just that, estimates built from each vendor's own data. Use them to tell an audience from an empty room, not to compare 4,100 visits with 3,800. Our roundup of link building tools compares the options, including free ones.
Editorial placement: where the link sits, and who put it there
A link inside a sentence of an article, written by someone who chose to cite you, is the strongest kind a small business can get. A link in a footer, a sidebar, a widget or a list of hundreds of names is weaker by design, and some of those placements appear on Google's list of link spam by name: links in widgets spread across many sites, links repeated in footers or templates, and low-quality directory and bookmark links.
Strong placements
- A sentence in a news story or trade article about your work
- A supplier's or manufacturer's page of certified installers
- An association's member directory you qualify for
- A local guide that recommends you by name, with a reason
Weak or risky placements
- Footer links repeated across a network of sites
- Paid guest posts on sites that publish anyone
- Widgets and badges with a keyword link baked in
- Comment and forum signatures stuffed with anchors
Paid placements are legitimate when they are labeled. Google's documentation on qualifying outbound links asks sites to mark ads and paid placements with rel="sponsored", and says links with these attributes will generally not be followed. A sponsored link on a busy community site is still a good link for customers; it simply is not a ranking play. Our guide to nofollow links explains the attributes.
DA, DR and Authority Score: useful rulers, terrible targets
Most link offers arrive priced by a score: Moz's Domain Authority, Ahrefs' Domain Rating or Semrush's Authority Score. Each is built by a software company from its own crawl of the web, not by Google, and each vendor describes its number as a way to compare sites rather than a verdict on any one link.
| Score | Made by | What it measures, per the vendor | The limit to remember |
|---|---|---|---|
| Domain Rating (DR) | Ahrefs | The strength of a site's backlink profile compared with others in Ahrefs' database, on a 0 to 100 scale | Ahrefs says never to judge a site's quality on site-wide authority alone |
| Authority Score (AS) | Semrush | A 1 to 100 compound of link power, estimated organic traffic and spam signals | Semrush says it is best used to compare domains, not as good or bad on its own |
| Domain Authority (DA) | Moz | Moz's own estimate of a domain's strength, built from Moz's link data | A vendor metric, like the others; it does not come from Google |
Two problems follow. A score can be pushed up with exactly the kind of links that make a site worthless as a link source, which is why sellers quote it. And a site-wide score says nothing about the specific page your link would sit on, which may be buried four clicks deep with no readers. Use the scores to shortlist prospects and to compare yourself with competitors. Never pay by the point. Our guide to domain authority explains how the scores are computed and why chasing them misleads.
Link farms, PBNs and the sites built to sell links
A link farm is a site, or a set of sites, that exists to sell or trade links. A private blog network, or PBN, is the same idea in disguise: a group of sites that look independent, often built on expired domains that once belonged to real organizations, all owned by one operator and used to point links at paying clients. Google's spam policies cover both from several angles: link spam itself, expired domain abuse (buying an old domain and repurposing it mainly to manipulate rankings), and site reputation abuse, where third-party pages are published on a host site mainly to ride that host's ranking signals.
- A "write for us" page with a price list, or an email offering placements by score
- Articles on every subject, from loans to lawn care, with no editor's voice
- Every post carrying two or three followed links to commercial sites
- A domain history that does not match the content, such as a former school or charity now publishing casino reviews
- No real contact details, staff or address, and an about page that could belong to anyone
- Several sites with the same template, the same hosting and links pointing at the same clients
- Plenty of links pointing in, and very little traffic coming from search
Two or three of these signs together are enough to walk away. The last two are among the spam signals Semrush folds into its Authority Score, which tells you something: even the vendors whose numbers sellers quote watch for networks.
If the link arrives with a price list and a delivery date, it was never an editor's choice.
Buying from these sites has a cost beyond the fee. Google's spam updates documentation says that once its systems neutralize spammy links, any ranking benefit they produced cannot be regained. Our guide to buying backlinks covers what link vendors actually sell and the narrow paid options that are legitimate.
A five-minute scorecard before you chase any link
Run this before you send an outreach email or accept an offer. It is our working checklist, not a Google rule, and it favors the links that help customers find you as well as rankings.
| Check | Good sign | Walk away if |
|---|---|---|
| Topic or place | Same trade, same customers or same town | No connection you could explain to a customer |
| Audience | Steady search traffic, readers who comment or share | Traffic near zero, or crashed and never recovered |
| Who decides | An editor, owner or writer chooses what to link | Placement is guaranteed for a fee |
| Placement | Inside the text of a relevant page | Footer, sidebar, widget or a page of hundreds of links |
| Other outbound links | A few, to sources that make sense | Every post links to unrelated businesses |
| Site history | A consistent owner and purpose for years | An expired domain with a new, unrelated purpose |
| Anchor text | Your name or the writer's own words | You are asked to supply a keyword anchor |
If you already have links that fail this scorecard, do not panic and do not disavow everything. Google's Search Console Help says most sites will never need the disavow tool. A backlink audit sorts real risk from noise.
Where high quality links come from, and getting help earning them
Good links rarely come from link searches. They come from relationships and reasons: manufacturers and suppliers that list installers, associations that list members, reporters who need a source, local guides that recommend businesses, and pages useful enough to cite. Our guide on how to get backlinks ranks fifteen such methods by effort, and digital PR covers earning coverage. The links that pass the scorecard also tend to be mentions people read, which is part of what off-page SEO is about.
If you would rather have it done, earning links is part of DataCram's monthly SEO programs: no long contract, a defined scope, from $625 a month, with most local businesses between $625 and $2,250 according to our SEO pricing page. We start by looking at who links to the businesses outranking you, which is what our competitor analysis does. And because a good link sends people to a page that has to earn the call, the free website audit is a sensible first check.
Questions owners ask about backlinks
A good backlink comes from a site related to your business or your town, on a page that real people read, placed because someone there chose to link to you. It sits inside the text rather than a footer or widget, uses your name or the writer's own words as anchor text, and would make sense to your customers. Scores matter far less than these basics.
No. Domain Authority and Domain Rating are site-wide estimates from software vendors, and they can be inflated by the same kind of manipulative links that make a site worthless as a source. A high-score site that sells posts on every topic is a poor link. A modest local association that lists you as a member is a good one. Ahrefs itself says not to judge a site on its authority score alone.
Look for several sites with the same template and hosting linking to the same businesses, content on unrelated topics with commercial links in every post, a domain whose history does not match its current content, no real people or contact details, and lots of inbound links but little search traffic. Two or three of these together is reason enough to stay away.
Not necessarily. A nofollow or sponsored link on a busy local news site or community page can send real customers and put your name in front of people who matter. Google says such links will generally not be followed, so they pass little ranking credit. Judge them by the visitors and reputation they bring, not by search value alone.
There is no number. Google does not publish one, and counts mislead because one link from a trade publication your customers read can outweigh dozens from sites nobody visits. Compare yourself with the pages ranking above you for your main searches: who links to them, and which of those links you could earn.
Usually not. Most sites pick up junk links without trying, and Google says its systems can neutralize spammy links on their own. Google's Search Console Help says most sites will not need the disavow tool. It is meant for cases with many spammy or artificial links that have caused, or are likely to cause, a manual action. A backlink audit tells you which case you are in.
Keep reading
- Earning linksHow to Get Backlinks: 15 Ways a Local Business Earns Links, Ranked by EffortHow to get backlinks without buying them: 15 methods for a local business, from suppliers and the chamber to local press and free tools, ranked by effort.
- Strategy before tacticsLink Building Strategies: Pick the One Your Business Can Win, Then Run It for Six MonthsLink building strategy for a small business: which pages need links, the three strategies that work, a six-month campaign plan, and how to measure it.
- Which searches you buyKeyword Match Types in Google Ads: Broad, Phrase and Exact, Tested on a Plumber's SearchesBroad, phrase and exact match as Google defines them in 2026, what replaced broad match modifier, negative keywords, and a plumber's keyword list, worked.
- Inside the machineHow Search Engines Work: Crawling, Indexing and Ranking, Explained by Google's Own RulesHow Google and Bing find, store and rank pages, in plain English: crawling, rendering, indexing, serving, and where AI Overviews fit. Sourced from Google.
- Everything in Link BuildingSee the section
Find out which of your links count
Tell us your site and the competitors you lose to. We will review your links and theirs, and reply with the ones worth earning and the ones to stop worrying about.
Which of these sounds like you? (pick any)
Rather talk now? Call (210) 346-0848.