A new café opens in town, and a local newspaper decides to write a story about it. The journalist describes the new café, introduces the people behind the business, and tells readers a little about what makes the place special. While writing about the café’s appearance, the journalist also mentions the interior design company that helped create its look. The newspaper includes a link to the design company’s website, giving readers a chance to see more of its work.
Now, think about that link for a moment. The newspaper publishes stories about local events and businesses, while the interior design company helps people design their homes and commercial spaces. They don’t work in the same industry, so a link between their websites might seem unusual at first. But when you read the newspaper’s article about the new café, the connection becomes clear. The design company was involved in creating the place the journalist is writing about, so mentioning the company and linking to its website makes sense in that particular story.
This is something you’ll often come across on the internet. When one website links to a page on another website, the receiving page gets what’s called a backlink. Some backlinks come from websites that discuss subjects closely related to yours, while others come from websites that seem to have very little in common with your own.
So what happens when a backlink comes from a website that appears unrelated to yours? Does that mean the link has no value for search engine optimization (SEO), or could it still be useful? The answer depends on more than the subjects of the two websites. We also need to understand why the link was included and what connection, if any, exists between the pages. And even when a link has a perfectly good reason to be there, that doesn’t automatically mean it will help the receiving website rank higher on Google.
The café example shows one reason websites from different industries might link to each other. But a business relationship isn’t the only explanation.
Sometimes a writer needs information from someone who works in a completely different field.
For example, a journalist writing about the rising cost of electricity might use research published by a university. The newspaper reports on economic issues, while the university conducts research across many subjects. If the journalist links to the study so readers can check the findings, the link has a clear purpose.
The same can happen with businesses, suppliers, professional associations, and organizations that work together. A website might link to a company that provided equipment for an event or to an organization involved in a community project.
In each case, the connection comes from something specific that happened or information the writer wants to share. You wouldn’t necessarily discover that connection by looking only at the general subjects of the two websites.
But there’s an important difference between a link that appears unrelated and one that genuinely has no meaningful connection to the content.
Can Irrelevant Backlinks Improve Google Rankings?
This is where we need to be careful about what a backlink can actually tell us.
Google uses links as one of the signals that help its systems understand and evaluate pages. However, that doesn’t mean every backlink improves rankings, or that we can calculate how much benefit a particular link provides.
Consider the newspaper’s link to the café’s interior design company. The journalist has a perfectly legitimate reason to mention that business. Readers who are interested in the design might follow the link, and some could even become potential customers.
Those are genuine benefits. But they don’t tell us whether the link has improved the design company’s position in Google Search.
Google doesn’t publish a formula that tells website owners how much ranking value an individual backlink receives based on topical relevance. Without that information, we cannot reliably conclude that a particular off-topic link will help, harm, or make no difference to rankings based on its subject alone.
That leaves us with an important distinction: a backlink can be useful to a business without having a measurable SEO ranking benefit.
What if the Backlink Has No Clear Connection at All?
Now imagine that the newspaper’s article about the café includes a link to an unrelated car insurance website. The journalist hasn’t mentioned driving, insurance, or anything that would explain why readers should visit that website.
Unlike the interior design company, the insurance website has no apparent connection to the story. The link seems out of place because the article doesn’t give readers a meaningful reason to follow it.
That doesn’t automatically prove the link is spam. There could be circumstances we don’t know about. But if the link was deliberately inserted to manipulate search rankings rather than help readers, it raises a different concern.
Google’s link spam policies specifically address links created primarily to manipulate rankings. These can include paid links that pass ranking credit, excessive link exchanges, and links placed in low-value content for ranking purposes.
The problem in those situations isn’t simply that two websites cover different topics. It’s the attempt to influence search results through links that weren’t included for a genuine editorial or informational reason.
This is why creating unrelated backlinks just to increase the number of links pointing to a website is not a sound SEO strategy.
How Should You Judge a Backlink That Looks Irrelevant?
If you discover a backlink from an unfamiliar website, the first thing to do is open the page containing it.
Read the paragraph where your website is mentioned. Does the writer use your information as a source? Is your business connected to the story? Does the link help explain something the reader might want to understand?
Then look at the page the backlink leads to. The destination should help you understand why the writer chose to link to it.
If the connection still isn’t clear, don’t automatically assume the link is valuable or harmful. An unusual backlink isn’t enough on its own to establish either conclusion.
The following examples show how to approach different kinds of backlinks that appear to come from unrelated websites.
| What You Find | Why the Link Might Exist | What to Do |
|---|---|---|
| A link from another industry | The business may have contributed to the story, provided a service, or participated in an event. | Check whether the article explains the connection and whether the link helps readers. |
| A link to research or information | A writer may be using findings from another field to support something they’re explaining. | Check whether the source supports the statement and the destination contains the referenced information. |
| A link with no clear connection | The link may have been inserted for promotion, or there may be a reason that isn’t immediately visible. | Examine the surrounding content and how the link was obtained, if known. Don’t assume it’s spam from the topic difference alone. |
And you don’t need to remove or disavow backlinks simply because they come from websites outside your industry. Google recommends using its disavow tool cautiously, primarily when there are substantial spammy or artificial links and a related manual action exists or is likely.
So, do irrelevant links have any SEO benefits? They can bring visitors, introduce a business to new readers, or help people discover useful information. Whether they also improve Google rankings is a separate question that cannot be answered from topical similarity alone.
The most useful place to begin is with the reason the link exists. Once you understand that, you can make a more informed judgment without treating every cross-industry backlink as either an SEO opportunity or a problem.
