10 Factors that Influence the Value of a Backlink

Originally published: April 3, 2021. Last updated: Oct 09, 2026.

Link building remains one of the most effective ways to improve your search engine visibility, because Google itself says it uses links as a signal when judging how relevant a page is, and to discover new pages to crawl (as summarized in SEOSavages’ 2026 backlinks guide). But not every backlink carries the same weight. A single editorial link from a respected, relevant website can move your rankings more than dozens of low-quality links, while spammy or manipulative links can actively hurt you.

So what separates a valuable backlink from a worthless (or dangerous) one? Here are the ten factors that determine how much a link is really worth.

1. Domain Authority (and Its Limits)

A web page’s domain authority is one of the first things SEOs check. Domain Authority (DA) is a 1-to-100 score developed by Moz that predicts how likely a website is to rank, calculated from linking root domains, total links, spam signals, and other proprietary metrics. Similar scores exist elsewhere: Ahrefs publishes Domain Rating (DR), and Semrush publishes an Authority Score.

There is an important caveat most beginners miss: Google does not use any of these scores. They are third-party estimates built from each vendor’s own link index, and different tools routinely disagree about the same website. As Moz’s own principal search scientist has stressed, Domain Authority is a comparative metric: it is useful for comparing your site against competitors, not as an absolute target. A DA of 40 might be dominant in one niche and weak in another.

Use authority scores as a rough filter when prospecting links, and look at the page-level strength too. A link from a strong page on a mid-authority site often beats a link from a weak page on a high-authority domain.

2. Topical Relevance

The links must flow with the content. A backlink from a website in your niche, or a closely adjacent one, carries far more weight than a higher-authority link from a completely unrelated site, and relevance is the hardest link property to fake. A tech blog linking to your SaaS article is more powerful than a cooking website doing the same.

This is also about trust: readers who click a relevant link arrive with context, stay longer, and convert more often. When prospecting, ask whether the linking site’s audience would genuinely care about your page. If the answer is no, the link is decoration, not value.

3. Link Placement on the Page

Where a link sits on the page matters. An editorial link woven into the main body of an article, surrounded by relevant text, is the most valuable placement. Links buried in footers, sidebars, blogrolls, author bios, or sitewide templates carry far less weight and can look manipulative at scale.

The same principle applies on your own site: internal links placed contextually in your content pass more value than navigational links. If you are still planning your website structure, design it so your most important pages earn contextual internal links, not just menu entries.

4. Referring Domain Diversity

It is not just how many links you have, it is how many different websites link to you. The first link from a new referring domain is worth substantially more than the tenth link from a domain that already links to you. A site with 100 links from 100 different domains has a stronger link profile than a site with 1,000 links from 10 domains.

This does not mean you should refuse repeat links from great sites. It means your link-building strategy should prioritize earning links from new, relevant domains rather than stacking more links on domains you have already covered. When people talk about diversity in link building, this is what they mean: breadth of quality sources, not just raw link counts.

5. Traffic and Real Visibility

Links that bring real visitors are the ones you need. A backlink from a page with genuine organic traffic does two jobs at once: it sends referral visitors who already have context about your topic, and it signals to search engines that the linking page is alive and trusted.

Check whether the linking page actually ranks and receives traffic before pursuing it. A link on a zero-traffic page created solely to host outbound links is worth little, even if the domain’s authority score looks impressive.

6. Link Attribute: Dofollow, Nofollow, Sponsored, or UGC

The rel attribute on a link tells search engines about the relationship between the two pages. Understanding the full matrix is essential, because the old dofollow-versus-nofollow framing is incomplete:

• Dofollow (no rel attribute): the default. A full editorial endorsement that passes ranking signals. This is what you want from earned, editorial links.
• rel="nofollow": a general “we do not vouch for this” marker. Use it for links you cannot fully endorse. Since 2020, Google treats nofollow as a hint, not a hard directive, so it may still crawl or count such a link if its systems judge it useful.
• rel="sponsored": introduced by Google in September 2019 for advertisements, paid placements, affiliate links, and sponsorships. Paid links must be qualified this way; failing to mark them can trigger a manual action for link schemes. Google Search Central’s documentation is explicit that sponsored is preferred for paid links.
• rel="ugc": also introduced in September 2019, for user-generated content such as blog comments and forum posts. It tells Google the link was placed by a visitor, not your editorial team.

Values can be combined (for example, rel="sponsored nofollow"). And here is a nuance many site owners miss: a nofollow link from a high-traffic, authoritative page is still worth having. It sends referral traffic and brand signals, and Google may treat it as a hint. As Ryan Robinson’s 2026 nofollow guide puts it, never skip a high-authority, high-traffic listing just because the link is nofollow.

7. Anchor Text

Anchor text is the clickable text of a link. It informs both the user and the search engine about what to expect on the other side, giving search engines contextual clues about your content. Descriptive, relevant anchor text is more beneficial than generic text like “click here,” and it is a good practice because you are not deceiving either the user or the search engine.

Across your whole backlink profile, aim for a natural mix dominated by:

• Branded anchors (your company or site name): the safe majority.
• Naked URLs (yoursite.com): natural and common.
• Generic anchors (“this article,” “read more”): fine in moderation.
• Partial-match keywords: useful in small amounts.
• Exact-match keywords: keep this a small slice. A profile stuffed with exact-match commercial anchors looks manipulative and is a classic penalty pattern.

You rarely control the anchor text of earned links, which is exactly why a natural profile emerges on its own. If you are building links deliberately, suggest branded or descriptive phrases rather than demanding keyword-rich anchors.

8. Editorial Merit: Earned Links vs. Link Schemes

How a link was obtained matters as much as where it points. Editorially earned links, given freely because your content deserved a citation, are the gold standard. Links that exist to manipulate rankings are link schemes, and Google has spent years building systems to neutralize them, from the Penguin algorithm to SpamBrain, which powers the December 2022 link spam update. That update specifically targets sites that buy links and sites that exist to sell them: those links are now most likely worth nothing, and at worst they count as evidence against you.

The sustainable approach is simple in theory and demanding in practice: create content people genuinely want to link to, original research, comprehensive guides, useful tools, and earn mentions through outreach and digital PR. Useful resources on the mechanics include Semrush’s backlinks guide.

9. The Linking Page’s Own Quality

A link inherits the reputation of its neighborhood. Pages that exist only to sell links, host spun or scraped content, or sit on private blog networks pass little value and can taint your profile by association. Before pursuing a link, check that the linking page is indexed, has real content, and is not stuffed with outbound links to unrelated sites.

Also watch for broken or hijacked pages: a link on a page that no longer loads, or a domain that changed hands into spammy use, is dead weight. Moz’s guide to types of link spam is a useful reference for recognizing the patterns to avoid. Keeping track of your content and refreshing older work matters here too: being a good web creator goes beyond building new content; it includes maintaining what you already have.

10. Freshness of the Linking Content

This factor is widely misunderstood. An old link is not a bad link: a long-standing editorial link from a healthy, maintained page retains its value, and age alone does not devalue a backlink. What matters is whether the linking content is still current and relevant. A link from a page that has been updated and continues to earn traffic is more valuable than one from an abandoned page whose information went stale years ago.

So do not chase “fresh” links for their own sake, and do not discard old ones out of superstition. Evaluate the page as it exists today: is it maintained, does it rank, would a reader still trust it?

How to Evaluate a Backlink in 10 Minutes

Put the ten factors to work with a quick checklist before pursuing or accepting any link:

1. Is the linking site topically relevant to your page?
2. Does the domain have a respectable authority score relative to your niche (DA, DR, or Authority Score as a rough filter, not a verdict)?
3. Does the specific linking page have real traffic and indexed content?
4. Will the link sit in the body content, editorially placed, rather than a footer, sidebar, or template?
5. Is this a new referring domain for you, or one you have already covered?
6. What is the link attribute, and does it match how the link was obtained (earned = dofollow; paid = sponsored; user-submitted = ugc)?
7. Is the anchor text natural, or suspiciously keyword-stuffed?
8. Was the link earned editorially, or does it smell like a scheme (paid placement, link farm, excessive reciprocal linking)?

If a link passes all eight checks, pursue it. If it fails on relevance, placement, or editorial merit, walk away no matter how impressive the domain score looks.

Wrap Up

When working on your link-building strategy, you should be aware of what affects a link’s value: the authority of the linking domain and page, topical relevance, placement, referring-domain diversity, traffic, the link attribute, anchor text, editorial merit, the linking page’s quality, and the freshness of the linking content. The end goal is a link profile built on genuinely earned, relevant links that real people click. If you try to outsmart the search engine with manipulative links, you invite more trouble than good. Pick links from reputable sources that add to your content, and let authority follow quality.

Frequently Asked Questions

What is the most important factor for backlink value?

There is no single factor. The strongest links combine topical relevance, a trustworthy linking domain and page, editorial in-content placement, a dofollow attribute, and natural anchor text. If you must prioritize one thing, prioritize relevance: a relevant link from a mid-authority site usually outperforms an irrelevant link from a famous one.

Do nofollow links help SEO?

They can. Since 2020 Google treats nofollow, sponsored, and ugc as hints rather than hard directives, so it may still crawl or count such links. More importantly, nofollow links from high-traffic pages send valuable referral visitors and build brand visibility. Never skip a great nofollow opportunity just because it does not pass full ranking credit.

Is Domain Authority a Google ranking factor?

No. Domain Authority is a 1-to-100 score created by Moz to predict ranking likelihood, and similar scores like Ahrefs’ Domain Rating are built the same way. Google does not use any of them. They are useful as rough comparative filters when prospecting links, but a higher score never guarantees a better link.

Can too many exact-match anchor texts hurt my rankings?

Yes. A backlink profile stuffed with exact-match commercial keyword anchors looks manipulative and is a classic penalty pattern. Natural profiles are dominated by branded anchors, naked URLs, and generic phrases, with only a small share of keyword-rich anchors.

Do backlinks lose value as they get older?

No. Link age is not a devaluation factor. A long-standing editorial link from a healthy, maintained page keeps its value. What matters is whether the linking content is still current, indexed, and trustworthy, not the date the link was first placed.

How many backlinks do I need?

There is no magic number. Referring-domain diversity matters more than raw link counts: 100 links from 100 different relevant domains beats 1,000 links from 10. One editorial link from a relevant authority can outperform dozens of directory submissions, so weigh links instead of counting them.

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