Backlink Analytics: Understanding Any Website’s Link Profile

Semrush’s Backlink Analytics report opens any website’s link profile — who links to it, how authoritative those links look, what anchor text they use, and how the profile changes over time. Learning to read it is learning to read the web’s trust graph: which sites earned real endorsements, which coast on history, and which show patterns of manipulation.

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Key takeaways

Referring domains matter more than total backlinks. One hundred links from one site is one relationship; one hundred links from one hundred sites is a reputation.
Authority Score is Semrush’s own proprietary metric — useful for comparing sites, meaningless as an absolute grade.
Anchor text patterns reveal intent. Natural profiles show mostly branded and URL anchors; exact-match-heavy profiles deserve skepticism.
New vs. lost links over time shows momentum — steady earned growth is healthy; sudden spikes and cliffs tell a story worth investigating.
Use this report to study competitors’ link profiles before building your own — then find your prospects in the Backlink Gap workflow.

What a backlink profile actually is

A backlink is a link from one website to another. A site’s backlink profile is the complete set — every page linking in, from every domain, with every anchor text, accumulated over the site’s life. Search engines have treated backlinks as votes of confidence for decades: a link spends the linking page’s credibility to vouch for yours.

Backlink Analytics inspects that vote record for any domain — yours, a competitor’s, or a potential partner’s. Two ground rules first: the report shows the link graph as Semrush’s crawler sees it (large index, but no index sees every link, and fresh links take time to appear), and you study profiles to learn, never to attack — no naming-and-shaming real sites based on your reading. Semrush updates its interface — if a label moved, search Semrush’s help center for the current name.

Referring domains vs. total backlinks

Total backlinks counts every individual inbound link. Referring domains counts the distinct websites behind them. A site with 10,000 backlinks from 200 referring domains is very different from one with 10,000 from 8,000 — and the second is almost always stronger.

Why? Search engines discount volume from a single source. Fifty links from one domain’s footer or template count as roughly one relationship; fifty links from fifty editorial pages are fifty independent endorsements. When comparing profiles, compare referring domains first, total backlinks second.

The ratio tells its own story. A healthy content site usually shows a low single-digit backlinks-to-domains ratio — most sites link once or twice. A very high ratio means a few domains link excessively (sitewide footers, widgets); a ratio near 1:1 at huge scale can suggest directory-style patterns. Neither is automatically bad; both deserve a look at which domains are doing the linking.

Follow vs. nofollow is the other split worth knowing. Nofollow links tell search engines not to pass ranking credit, but they still send visitors and still appear in the profile — a natural profile has plenty, from social platforms, forums, and comments. A profile with zero nofollow links is less natural-looking than one with many, because real-world linking is messy.

Authority Score: Semrush’s proprietary metric

Backlink Analytics shows an Authority Score for domains — and this needs a clear label, because beginners treat it as an official grade. It is not. Authority Score is Semrush’s own proprietary metric, a composite Semrush computes from its link data. Google has no such score, and no other tool’s “authority” number means the same thing.

Used correctly, it’s genuinely useful as a relative measure: ranking five competitors by Authority Score usually matches reality well enough to prioritize your attention, and vetting a prospect, a very low score next to a very high one tells you where to look first.

Used incorrectly, it’s a trap. A score of 42 is not “42% good.” It doesn’t translate to rankings, traffic, or revenue, and it can’t be compared with another tool’s authority number — different formulas, different scales. Chasing a higher score as a goal is backwards: the score follows from earning good links; it doesn’t cause them.

The working rule: Authority Score is a sorting hat, not a report card. Use it to order lists and spot outliers, then analyze the underlying links.

Reading anchor text patterns

Anchor text — the clickable words of a link — is where profiles tell on themselves. The anchors view groups a domain’s inbound anchors, and natural profiles have a recognizable shape: branded anchors dominate (most people link using the site’s name), raw URLs and generic phrases (“here,” “this guide”) fill the middle, and exact-match keyword anchors are a minority.

When exact-match commercial anchors dominate — hundreds of links all saying “best cheap widgets” pointing at a homepage — that’s the classic footprint of built rather than earned links. Search engines have penalized this pattern for years. A competitor ranking despite a spammy-looking anchor profile is ranking on other strengths (or borrowed time); one ranking with a clean branded profile has links you’ll need to match with genuinely link-worthy content.

Two cautions: anchor patterns are circumstantial, not proof — a viral post can legitimately attract keyword-rich anchors. And this is analysis, not accusation: rebrands, migrations, and old SEO agencies all create odd-looking profiles for innocent reasons. Read the pattern, note it, move on.

New vs. lost links: momentum over time

The historical view — new and lost referring domains over time — turns a static profile into a story. Read it like a cardiogram:

Steady upward slope. The site earns links month after month — content that keeps attracting references, a brand that keeps growing. If a competitor shows this, study what they published during the climb.

Flat line. Few new links, few lost. Established sites coasting on old authority look like this — and so do neglected ones. A flat competitor is beatable: their profile is a museum, and fresh, better content can outrank museum pieces.

Sudden spike. Usually a story: a viral post, a PR hit, a launch — or a link-building campaign. Click into the timeframe and check which domains appeared. Editorial links during a launch week are earned; hundreds of thin blogs in three days are not.

Sudden cliff (lost links). Mass loss often means a network was cleaned up, a widget removed sitewide, or domains expired. On your own site, it’s a maintenance alert: find what was lost and whether it’s worth reclaiming.

Sawtooth churn. Constant gains matched by constant losses suggests rented or unstable links. Busy-looking, accomplishing little.

For your own domain, check this view quarterly. For competitors, it’s a strategy X-ray: the shape of their link history reveals whether they’re actively earning, coasting, or buying.

Healthy vs. manipulated-looking profiles (in general terms)

A healthy-looking profile typically shows: gradual referring-domain growth tracking content output; anchors dominated by brand, URL, and natural phrases; links from topically relevant sites; a mix of follow and nofollow; and links spread across many pages — especially the best content, because real people link to useful pages, not just homepages.

A manipulated-looking profile typically shows one or more of: explosive domain growth with no matching content or PR event; exact-match commercial anchor dominance; links concentrated on money pages; heavy linking from irrelevant topics or thin sites; and network tells like identical templates or interlinked clusters.

Why learn this? You won’t waste effort imitating tactics one algorithm update from disaster; you’ll spot when a competitor’s rankings rest on fragile foundations (an opening for you); and you’ll keep your own link building honest — the only kind that compounds. If your own profile shows the second pattern from an old agency or past experiments, the fix is slow and boring: earn real links until they drown out the old ones.

Putting it to work: the competitor link study

Run this focused workflow on two or three competitors after completing the keyword-side analysis in the competitor analysis tutorial.

Record the baselines. For each competitor: referring domains, total backlinks, Authority Score, and the shape of their new-vs-lost history. Put your own numbers beside them — the referring-domain gap is the mountain; now you know its size.
Skim the top referring domains. Who links to them that doesn’t link to you? Look for types — industry publications, resource lists, tool directories, podcasts — rather than individual targets. The types become your outreach categories.
Check where the links point. If 80% hit their homepage, their brand earns links, not their content. If links spread across guides and tools, their content engine is the thing to study (and beat).
Note the anchor story. Branded and natural? They earned it — plan to earn yours. Exact-match heavy? Don’t copy the tactic; note the fragility.
Feed prospects to Backlink Gap. Quality linking domains you spotted become competitor inputs for the Backlink Gap guide — your actual prospect list.
Triage your own issues first. Before chasing new links, fix what’s broken: legacy links worth disavowing, lost links worth reclaiming. The site audit triage guide covers the fix-first mindset — repair before you expand.

Budget about an hour per competitor for the first pass; a quarterly glance at the momentum view keeps you current after that.

Frequently asked questions

What is the difference between referring domains and backlinks?
Backlinks count every individual inbound link; referring domains count the distinct websites those links come from. Referring domains is the more meaningful number because search engines discount multiple links from the same source — one hundred links from one site is roughly one relationship, while one hundred links from one hundred sites is a broad reputation. When comparing link profiles, always lead with referring domains and use total backlinks as context.

What is Semrush’s Authority Score?
Authority Score is Semrush’s proprietary composite metric estimating a domain’s link-based strength from Semrush’s own data. It is not a Google metric and can’t be compared with other tools’ authority numbers, which use different formulas. Use it as a relative sorting tool — to rank competitors or prioritize prospects — not as an absolute grade. The score follows from earning good links; it doesn’t cause rankings by itself.

How can I tell if a backlink profile looks manipulated?
Look for patterns, not single links: explosive referring-domain growth with no matching content or PR event, anchor text dominated by exact-match commercial keywords, links concentrated on money pages instead of content, and heavy linking from topically irrelevant or thin sites. These are circumstantial signals, not proof — innocent explanations exist (rebrands, migrations, old agencies). Use the reading to guide your own strategy, never to accuse a real site publicly.

How often should I check my backlink profile?
Quarterly is plenty for most sites. Check the new-vs-lost momentum view for surprises — sudden cliffs (lost links worth reclaiming) or spikes (worth understanding). After deliberate link-building campaigns or digital PR pushes, check sooner to confirm the new links actually appeared in the index. Daily checking is anxiety, not analysis; link indexes update on their own schedule regardless of how often you look.

Can I see who links to my competitors but not to me?
Yes — that’s exactly what the Backlink Gap tool does: you enter your domain plus competitor domains and it lists prospects linking to them but not you. Backlink Analytics is the right first step (understand the profiles, spot the patterns), and Backlink Gap is the second (turn the understanding into a prospect list). Vet every prospect for relevance before metrics — a relevant link from a modest site beats an irrelevant one from a giant.

Your concrete next step

Run your own domain through Backlink Analytics today. Write down four numbers — referring domains, total backlinks, Authority Score, and the shape of your new-vs-lost history over the last year — then run your closest competitor and put their numbers beside yours. The gap between the two referring-domain counts, and the difference in momentum shapes, is your link-building brief for the next quarter.

Educational note: HowToSemrush publishes independent educational content about using Semrush. This is educational only — not affiliated with or endorsed by Semrush. Semrush updates its features and interface over time, so verify current details on semrush.com.