Backlink quality is the degree to which a link’s source page is relevant, authoritative, visited, indexed and durable. This page defines seven criteria, explains what each one tests, and scores a link on a 7-point pass-fail scale so a buyer or site owner can rate any backlink before ordering or keeping it.
What makes a backlink high quality?
A high-quality backlink comes from a relevant, authoritative, visited and indexed page, sits inside body content, carries a followed attribute and stays in place. Seven checks cover these properties: relevance, authority, traffic, placement, indexation, attribute and permanence.
- Relevance: the linking page covers the same topic as the target page.
- Authority: the linking domain holds credible links of its own.
- Traffic: the linking page or site earns organic visits.
- Placement: the link sits inside body content.
- Indexation: the linking page is in Google’s index.
- Attribute: the link carries a followed rel value.
- Permanence: the link remains on the page for at least 12 months.
Each criterion is a pass or fail test that takes under a minute to run. The scoring section below turns the seven results into one rating.
Does domain authority decide backlink quality?
No, domain authority is one of seven criteria and a third-party estimate. Moz Domain Authority and Ahrefs Domain Rating score a whole domain on a 100-point scale; neither is a Google metric, and neither tests relevance, placement or indexation.
Moz Domain Authority runs from 1 to 100 and Ahrefs Domain Rating runs from 0 to 100. Both summarize the strength of a domain’s link profile. A page on a DR 70 site that is not indexed passes the authority test and fails the indexation test, which makes the link worthless as a reference. High-authority backlinks are links that pass several criteria together, not links that pass one.
Why does relevance matter for a backlink?
Relevance matters because a link works as a topical reference: a page citing a source on the same subject gives search engines a clear connection. A link from an unrelated page adds a reference with no subject match.
Test relevance in two steps. Compare the topic of the linking page with the topic of the target page, then compare the topic of the linking site with the target’s industry. A plumbing guide that links to a plumbing supplier passes both steps. A recipe blog that links to the same supplier fails both.
Where on the page does a backlink belong?
A backlink belongs inside the body content of the page, within a sentence that discusses the target’s topic. Footer, sidebar and sitewide links repeat on every page of a site and carry less editorial context. Body links sit inside sentences that give readers a reason to click.
- Body links: sit inside a paragraph that discusses the subject, which gives the link editorial context.
- Sidebar links: repeat across a template, so a single placement counts as many identical links.
- Footer links: appear on every page and signal a site-wide relationship, not a citation.
Does the link attribute change quality?
Yes, the rel attribute changes how search engines treat the link. A followed link passes reference value; nofollow, sponsored and ugc values are hints that Google weighs alongside other signals, and each has a legitimate use. Followed links are the default for editorial citations.
A followed link carries no rel value or a plain one. The guide to DoFollow and NoFollow covers each value, the September 2019 change that added sponsored and ugc, and the cases where a nofollow link still earns its place in a profile.
How do you score a backlink?
Score a backlink by checking seven properties as pass or fail and counting the passes. Six or seven passes mark a high-quality link, four or five mark an acceptable link, and three or fewer mark a low-quality link. The bands are a working heuristic.
| Criterion | Pass test | Failing example |
|---|---|---|
| Relevance | Linking page and target share one topic | A gardening page linking to a software tool |
| Authority | Linking domain holds its own credible links | A domain with no referring domains |
| Traffic | Linking page or site earns organic visits | A site with zero organic visits |
| Placement | Link sits inside body content | A footer link on every page |
| Indexation | Linking page appears in Google’s index | A page marked noindex |
| Attribute | Link carries a followed rel value | A link marked nofollow |
| Permanence | Link remains for 12 months or longer | A link removed after 30 days |
The three bands, our working heuristic and not a Google threshold: High is 6 to 7 passes, Acceptable is 4 to 5 passes, Low is 0 to 3 passes. A nofollow link fails the attribute test but still passes the other six on an editorial page, which is why the Acceptable band exists.
Which links earn a high score?
Placements inside new or existing articles on topical sites score highest, because they pass relevance, placement and indexation by construction. Footer and sitewide links score lowest. The method that fits depends on whether the host page already ranks.
Guest posts compared with niche edits shows how each method fares on the seven checks.
How does link quality shape a whole profile?
One link’s score matters less than the share of high-score links across the whole set. A site whose links mostly score Acceptable or Low has a weak profile whatever the count. The share of High scores, not the total, sets the strength of the profile.
The structure of a healthy link profile sets the target mix of scores, anchors and sources.
Backlink Agency applies the same seven checks to every order and records the results per link in the reporting sheet. Buyers who want placements that pass them order the guest posting service, and the current link building pricing lists each package with its authority band and delivery time.
Related: related backlink guides and removing links that fail the checks.