Nobody plans an irrelevant link profile; it comes with the price list. An agency sells a link package: twenty placements a month, chosen by domain metrics and price. A link exchange filters donor sites by traffic and authority, and the cheapest sites with good numbers are general blogs that accept anything: recipes, horoscopes, travel, parenting. So a car service in Kazan ends up with an article about choosing brake pads on a recipe blog, between a post on borscht and one on Easter cake, with the anchor «car service Kazan inexpensive». Each placement looks harmless, and the monthly report shows the number of referring domains growing. Open the backlink report a year later and you find two hundred domains, almost none of them about cars, roads or the city, and nearly every link with the same commercial anchor. The site has links, but almost none of them come from anywhere a driver would be.
WHAT COUNTS AS AN IRRELEVANT LINK
A link is irrelevant when nothing connects the page that carries it to the page it points to: not the topic, not the audience, not the region. The test is simple. Would a reader of the linking page ever have a reason to click? Someone looking for a pie recipe has no reason to visit a car service.
Typical cases:
- A paid guest post on a general «about everything» blog that publishes on any topic for a fee.
- An article written only to hold the link, on a site from another industry: «how to choose winter tyres» on a recipe or beauty blog.
- A link inserted into an old, unrelated article, so a 2019 post about sourdough suddenly recommends a garage.
- Footer, sidebar and «partners» links on every page of an unrelated site.
- A link from a foreign-language site to a regional Russian business.
- Directory and bookmark sites that list every business that submits, whatever its field.
- Forum signatures and blog comments with commercial anchors, in threads on any subject.
Not every off-topic link is a problem. A food blogger who writes about a road trip and thanks the garage that fixed her car on the way has given a natural link: it has context, a reason and readers who might care. A city news portal that links to a car service, a bakery and a dental clinic is not off-topic either, because the shared subject is the city. Relevance can come from the topic, the audience or the region, and a link needs only one of them to make sense.
It also matters how many there are and what they look like. One odd link is noise. A profile where most referring domains have nothing to do with the business, and the links carry exact commercial anchors, is a pattern, and patterns are what search engines look for.
The distinction that matters: a natural link exists because the linking page has a reason to mention you. An irrelevant link exists because someone paid for a place to put it.
WHY IT COSTS YOU TRAFFIC
External links matter because they look like independent recommendations from people who know the subject. A link from an automotive forum, a parts store or a city portal says something about a car service. A link from a recipe blog says only that a placement was bought. Google’s spam policies list the practices behind most such links: buying links for ranking purposes, sponsored articles and guest posts that pass ranking credit or use optimised anchor text, low-quality directory and bookmark links, and links distributed across site footers and templates. Paid placements are allowed as advertising, but only if the link carries rel=»sponsored» or rel=»nofollow», which removes exactly the ranking value the buyer wanted.
The first cost is wasted money. Google says its SpamBrain system can identify both sites that buy links and sites that exist to pass outgoing links, and its link spam updates neutralise unnatural links instead of counting them. A recipe blog that sells an article to anyone with a budget is the kind of site this detection is built for. The links stay in your report, but their value may already be zero, and you keep paying for placements that change nothing.
The second cost is risk. When unnatural links are numerous and obvious, Google can issue a manual action for unnatural links to the site, and the affected pages lose rankings until the links are cleaned up and a reconsideration request is accepted. Yandex addressed purchased links with its Minusinsk algorithm, launched in May 2015, which lowers sites that use bought SEO links. The way out is to remove those links, and that takes time.
The third cost is a weak signal. Links, their anchors and the text around them tell a search engine what the target page is about and who considers it worth mentioning. When two hundred links come from food, beauty and lifestyle blogs, the profile describes nothing in particular, and the handful of relevant links make up a small share of the total. A competitor with forty links from automotive and local sites can outrank you on a fifth of your link budget.
There is also a cost on the host side. Google’s site reputation abuse policy targets third-party content published on a site mainly to borrow its ranking signals. Google’s own example is a medical site hosting an unrelated «best casinos» page. A car-service article on a recipe blog is the same pattern on a smaller scale, and when the host site is demoted, the links from it lose whatever they were worth.
AI-driven search adds another layer. AI assistants build their picture of a business from the places that mention it. A car service mentioned on automotive forums, in local news and on review sites becomes «a car service in Kazan» in AI answers. One mentioned mainly on recipe blogs gets no useful association at all: the mentions exist, but they do not say what the company does or where it works.
WHY THIS MISTAKE KEEPS HAPPENING
Links are bought by metrics, not by topic. Link exchanges and agencies sort donor sites by authority, traffic and price. Topic is a filter that shrinks the list and raises the price, so it is often left switched off.
Relevant sites are scarce. There are only so many automotive sites in one region, and the good ones do not sell placements to anyone who asks. General blogs accept any topic and publish within a day.
The report counts domains. «+20 referring domains this month» is easy to show a client. Whether those domains have anything to do with the business is not in the report.
Some sites exist to sell links. Many blogs on link exchanges have broad categories, rewritten content and no real audience. Their metrics look fine, and that is the point of them.
Old links outlive the strategy. A profile built in 2012–2018 through rental link exchanges such as Sape is still there, even if nobody has bought a link since.
And nobody reviews the profile. The agency changes, the contract ends, the links stay, and nobody owns the question of where they come from.
THE MOST COMMON FORMS IN PRACTICE
The «about everything» blog. One site, fifty categories, from recipes to car repair to cryptocurrency. Each category exists to host paid posts.
The forced topic switch. A recipe or beauty blog with a single post about brake pads, signed by «a guest author» and linking to one car service with an exact anchor.
The link insertion. A link added to an old article on another subject: a post about sourdough that now «also recommends» a garage.
The sitewide partner link. A footer or sidebar link on every page of an unrelated site, usually left over from an old exchange deal.
The foreign donor. Links from English, Polish or Indonesian sites to a regional Russian business, usually from bulk packages.
The directory dump. Hundreds of «business catalogues» with no visitors, listing everyone who filled in the form.
The comment trail. Forum signatures and blog comments with commercial anchors under posts on any topic.
HOW TO FIX IT
Start with an export, not with deleting. Export all referring domains with their topic, language, traffic, anchor, target page and first-seen date. Sort them into four groups: relevant by topic, relevant by region or audience, off-topic but natural (a real mention with context), and off-topic and paid. Only the last group needs action.
Deal with the links you control first. Placements that you or your agency bought can usually be removed or changed. Ask the site owner or the exchange to delete the link or to add rel=»sponsored», and stop paying for rental links. For Yandex this is the only effective measure, because Yandex has no tool for disavowing links.
Use Google’s disavow tool narrowly. Google says most sites will not need it. It is meant for a considerable number of spammy, artificial or low-quality links that have caused, or are likely to cause, a manual action and that you cannot get removed. Google also warns that incorrect use can harm the site’s performance. If there is no manual action and the irrelevant links are random spam you never built, Google is most likely ignoring them already. If there is a manual action or a clear history of bought links, disavow the domains you could not clean up and file a reconsideration request.
Change how links are bought. If you still buy placements, choose donor sites by topic, region and audience first, and by metrics second. For a car service that means automotive media and forums, parts stores, insurance and leasing partners, city portals and local news, maps and review services. Mark advertising as advertising with rel=»sponsored». Prefer fewer placements on sites people actually read.
Earn links that cannot be bought. Suppliers’ «where to buy» and «authorised service» pages, membership in industry associations, local sponsorships, expert comments in regional media, and useful content that local sites want to cite: a maintenance calendar for the region’s climate, a table of typical repair prices.
Change the process. Put relevance into the agency contract: allowed donor topics and regions, anchor rules, and a monthly report that lists every new domain with its topic, not just a count.
HOW TO CHECK IF YOU HAVE THIS PROBLEM
Start with free data. In Google Search Console, the Links report shows «Top linking sites» and «Top linking text». In Yandex Webmaster, Ссылки → Внешние ссылки lists the linking domains and pages Yandex has found. Neither tool shows topics, but you will see the domains and can open the biggest ones.
Use a backlink tool for scale. Ahrefs and Semrush list referring domains with traffic and anchors. Majestic assigns each domain a Topical Trust Flow category, which shows at a glance how much of the profile comes from categories like Home/Cooking rather than Recreation/Autos.
Read the anchors. A natural profile is dominated by the brand name, the bare URL and phrases like «this garage». If most anchors read «car service Kazan inexpensive», the links were placed, not earned.
Open the donors. Pick ten random linking pages. Does the site have real content and visitors, or fifty categories and a «publish your article» page? Does the article make sense for that site’s readers?
Check for a manual action. In Search Console, open Security & Manual Actions → Manual actions. An «Unnatural links to your site» notice means the problem is no longer theoretical.
And the simplest check of all: take your twenty biggest referring domains, hide the metrics and read only the site names and the titles of the linking pages. If a stranger could not tell from that list what your company does and where it works, neither can the search engine, and neither can the AI assistant deciding which garage to recommend.