What is backlink? A straight answer for business owners

TL;DR

• A backlink is a link on somebody else’s website that points at a page on yours. That’s the entire definition.
• Google uses links for two jobs: finding pages it hasn’t seen yet, and judging how relevant a page is. It is one signal, not the signal.
• The link has to be a proper anchor tag with a real address in it. Links buried in buttons and scripts often pass nothing.
• Ten relevant links from real UK sites beat a thousand from directories nobody reads. Quality is not a slogan here, it’s the whole game.
• You can see most of your own backlinks for free in Google Search Console. Start there before you spend anything.

If you’re asking what is backlink, the short version is this: a backlink is a link on someone else’s website that sends a visitor to a page on yours. That’s it. Everything after that is an argument about which ones are worth having.

People make it complicated because links have been the most gamed part of SEO for twenty years. So an honest answer needs two halves: what the thing actually is, and which ones do anything for a small business.

So that’s what this is. The definition first, then the quality test I use, then how to check the links you already have without buying a tool.

What is backlink, in plain English?

A backlink is a clickable link on another website that sends someone to a page on your site. From your side it’s an inbound link. From theirs it’s an outbound one. Same link, two names, which is half the reason the subject feels murkier than it is.

Two parts of it matter. The address (the bit in the href) is what Google follows. The anchor text is the visible wording somebody clicks, and Google reads that wording as a short description of what it’s about to find.

That sounds obvious until you look at how many “links” on real websites aren’t links at all. Google’s link best practices are specific: it can only reliably pull addresses out of proper anchor elements. A styled box that fires a script on click, an image map, a widget that pops open a new window: those can pass nothing.

I’ve seen this exact problem on brand-new websites more than once. The owner had earned genuine coverage, the link was there on screen, and Google couldn’t read a single one of them.

How does Google actually use a link?

Google uses links for two separate jobs: discovering pages it hasn’t crawled yet, and judging how relevant a page is to a search. Discovery is the unglamorous one, and for a new site it’s usually the more useful of the two.

The judging half is where all the noise comes from. Google’s own wording is that links are a signal when working out the relevance of pages. A signal. Not the signal, and not a scoreboard you can top up.

There’s also a layer of markup that changes what a link means. Site owners can tag an outbound link with rel="sponsored" for anything paid, rel="ugc" for user-generated content like comments, or rel="nofollow" to say they don’t want to vouch for the destination. Google’s guidance on link attributes sets out when each one applies.

Since 2019 those tags have been treated as hints rather than hard instructions. In other words, a nofollow link isn’t automatically worthless, and a followed link isn’t automatically worth something. Google decides.

What is backlink quality, and how do you judge it?

Backlink quality comes down to whether a real person, on a real site with a real audience, chose to point at you for a reason. If you can’t tell that story about a link, it probably isn’t doing much.

Here are the five checks I run, in order:

1. Relevance. Would a customer of theirs plausibly want your page? A Buckinghamshire builders’ merchant linking to a local roofer makes sense. A gambling blog in another language does not.
2. Realness. Does the site have actual visitors, actual updates, actual contact details? Open it and read a page. It takes fifteen seconds and it answers most of the question.
3. Editorial choice. Did someone decide to link, or did a script place it? Anything auto-generated across hundreds of pages is a footprint, not an endorsement.
4. Honest anchor text. Natural anchors read like language. Ten links all saying the same exact commercial phrase looks manufactured, because it usually is.
5. The page, not just the domain. A link from a busy, well-linked page on a site carries more weight than one from a page nobody visits on the same domain.

Notice what isn’t on that list: a third-party authority score. Those metrics are estimates built by tool companies, not numbers Google publishes. They’re handy for sorting a long list quickly. They’re a bad reason to buy anything.

Which types of backlink actually count?

Most backlinks fall into six buckets, and only about half of them earn their keep for a UK service business. This table is roughly how I’d rank them for an owner-operator.

Google’s spam policies put buying and selling links for ranking purposes squarely in the link spam category. Paid links aren’t banned as such: sponsorship and advertising are normal, and Google’s position is that they’re fine as long as the link carries a sponsored or nofollow attribute. What isn’t fine is paying for a plain link and hoping nobody notices.

In practice the usual outcome isn’t a penalty. It’s that the link gets quietly discounted and you paid for nothing.

Do you actually need backlinks to rank?

Not always, and that surprises people. For low-competition local searches, a well-built site with a properly optimised profile can rank with barely any links at all.

The data does still favour links overall. Ahrefs found that the vast majority of pages get no traffic from Google, and that pages with no referring domains almost never pick up meaningful search visits. Their follow-up work found that higher-ranking pages tend to acquire more links over time.

Read that carefully though, because the direction of cause isn’t obvious. Pages that rank get seen, and pages that get seen get linked. Links help, and ranking also earns links. Both are true.

For local businesses there’s a more specific reason to care. Google’s guidance on local ranking names prominence as one of three factors, alongside relevance and distance, and describes prominence partly in terms of how many websites link to your business.

So links feed the map results too, not just the blue ones. That’s a big part of why local SEO work and link work end up on the same to-do list, along with keeping the Google Business Profile properly filled in.

How to check the backlinks you already have

Before you go looking for new links, look at the ones you’ve got. Google gives you this free, and most owners have never opened it.

1. Open Google Search Console and pick your property. If you haven’t verified the site yet, do that first, it takes about ten minutes.
2. Click Links in the left-hand menu. The Links report splits into top linked pages, top linking sites, top linking text, and your internal links.
3. Read top linking sites first. You’re looking for names you recognise: suppliers, local press, trade bodies, customers. Those are your real link profile.
4. Read top linking text next. If one commercial phrase dominates, something has been over-optimised, probably by a previous agency.
5. Check Manual actions in the same menu. A clean report there means Google hasn’t taken human action against the site. If there’s a manual action listed, that’s your first job, ahead of everything else.

Do not rush to the disavow tool. Google’s own advice is that most sites never need it, and a careless disavow file can remove links that were helping you. It’s for cleaning up after a manual action or a genuine history of bought links, not for tidying.

The backlink mistakes that cost UK owners the most

The most expensive one is buying a package of links because the price looked reasonable next to a month of proper work. That money buys volume from sites with no readers, and volume is the one thing that’s easy to spot.

The second is chasing a tool’s authority score instead of relevance. A link from a small Slough trade association is worth more to a Slough business than a high-scoring link from a site with nothing to do with the trade.

The third is treating links as a separate project from the site itself. Nobody links to a page that isn’t worth linking to, which is why Google’s guidance on helpful content and its Search Essentials both start with the page, not the promotion. If the page is thin, links won’t rescue it.

The fourth is impatience. Links compound. They don’t spike.

What I’d actually do first

One project that comes to mind is CoLaz, the clinic group I grew from 1 location to 9 between 2016 and 2022 before it was sold. Every new location got its own page, its own profile, and its own small pile of local links: the shopping centre’s tenant list, the local paper’s business section, a supplier’s stockist page, a charity we sponsored. Nothing clever. Nothing bought.

The lesson I took from it, and the one I still lean on in SEO consulting work, is that year one looks like almost nothing and year three is where the curve bends. If you want the longer version of that story, it’s on the page about my background.

So here’s what I’d actually do, in this order:

1. Pick the one page that would make you money if it ranked. One, not five.
2. Make that page genuinely worth linking to: real detail, real photos, real prices where you can give them, real answers to the questions you get asked on the phone.
3. Open Search Console and list the links you already have.
4. Write down five organisations who already have a reason to mention you: suppliers, a trade body, a local charity, the town business group, a customer with a website.
5. Ask them. Plainly, by email, with a specific page and a sentence they can paste.

That’s a week of work, spread thin. It’ll beat any package you can buy, and nothing in it can get your site into trouble later.

If you want a second opinion on your own link profile before you commit to anything, get in touch and tell me what’s going on. I’d rather tell you the links you already have are fine than sell you a project you don’t need.