What Are Backlinks and How Many Does Your Site Really Need?

Backlinks sit at the heart of almost every conversation about SEO, but the term itself trips up plenty of small business owners. In plain English, what are backlinks? They are simply links from one website to another. When another site links to yours, that link is a backlink pointing to your page, and it acts as a kind of online vote of confidence that search engines take into account when deciding where your pages should rank.

It is a deceptively simple idea, and the simplicity is exactly why it causes confusion. People hear that 'links matter' and immediately start counting them, comparing numbers, or worrying that competitors have more. The truth is more nuanced: a small handful of well-chosen links from the right places will typically do far more for a small business site than hundreds of weak ones. In this guide we will cover what backlinks actually are, how they work, what makes one worth pursuing, and how many your business realistically needs to compete in the UK market.

If you are still working through the basics of how search engines see your site more broadly, our piece on technical SEO foundation mistakes is a useful companion read. Backlinks only deliver value when the technical layer beneath them is sound, and that article covers the sort of issues that quietly stop links from doing their job.

What Are Backlinks in Digital Marketing?

Digital marketing is full of overlapping jargon, so let us pin the term down clearly. What are backlinks in digital marketing? They are off-page SEO signals, meaning they happen away from your own website, generated by other sites on the internet choosing to reference, cite, or recommend your content. This sits in contrast to on-page SEO, which covers everything you control on your own pages, from headings and copy to internal links and schema markup.

What are backlinks on a website, in even simpler terms? They are inbound hyperlinks from a different domain. It does not matter whether the linking site is a national newspaper, a trade publication, a local business association, or a blog run by someone in your industry. As far as search engines are concerned, the signal is the same type of object, but the value they assign to it varies dramatically, which we will come to shortly.

The other distinction worth making is between backlinks and internal links. Internal links connect one page of your site to another page of your site. They are crucial for SEO, but they are not what people mean when they say 'backlinks'. Backlinks, by definition, are external: they come from other domains. And what are backlinks for SEO specifically? They remain one of the strongest off-page signals Google's algorithm uses to gauge whether a page deserves to rank for its target queries, which is why the rest of this guide is dedicated to using them well.

How Do Backlinks Work?

Understanding the mechanics helps you judge what actually matters. The short version of how backlinks work is this: search engines like Google crawl the web by following links. When their crawlers find a link on one page pointing to a page on another site, they follow it, index the destination, and use the link as one of many signals about that destination's relevance, authority, and trustworthiness.

So what are backlinks and how do they work in practice? Imagine a UK trade magazine publishes an article about sustainable packaging, and within that article it links to a guide you have written on your own site. The link gives search engines three pieces of information: a topic cue (sustainable packaging), a discovery path (where to find your page), and a measure of editorial endorsement (the magazine thought your content was worth referencing). The first two help with crawling and indexing; the third is the part most people fixate on.

The 'endorsement' interpretation is why backlinks have a reputation as the web's currency. Google itself has, for many years, framed links as votes, and the original PageRank algorithm was built on the idea that a link from a respected source carries more weight than one from an unknown one. That framework still shapes how backlinks are evaluated today, even as Google has layered many additional signals, from content quality to user behaviour, on top.

What Makes a Backlink Valuable?

Once you accept that not all links are equal, the next question is what separates a useful one from the dozens of low-value links a small business might collect without realising. Which brings us to the natural follow-up: what are backlinks and why are they important? They matter precisely because they are difficult to fake at scale, and they remain one of the better proxies search engines have for genuine third-party endorsement. The dimensions that determine how much weight a given backlink carries are as follows.

• Relevance of the linking site. A link from a site in your sector, or covering a topic closely related to yours, is worth more than a generic link from an unrelated site. A backlink from a UK trade body in your industry to a relevant guide on your site is more powerful than one from an unrelated general-interest blog.
• Authority of the linking domain. A link from a well-established, trusted publication will typically move the needle further than a link from a brand-new site nobody has heard of. You do not need a list of specific numbers to understand the concept: think of it as a spectrum from well-known national outlets at one end to obscure or spammy sites at the other.
• Anchor text. This is the clickable words used in the link. Descriptive anchor text that reflects the topic of your page gives search engines more context than generic phrases like 'click here' or 'visit our website'.
• Link placement. A backlink placed editorially within the body of an article is generally more valuable than one tucked away in a footer, sidebar, or comment section. Search engines are reasonably good at noticing the difference.
• Followed versus nofollowed. Some links carry a 'rel=nofollow' (or similar) attribute, which tells search engines not to pass the usual endorsement signal. Nofollowed links can still drive traffic and raise brand awareness, but they do not directly pass ranking benefit in the same way a followed link does.

How Many Backlinks Does Your Site Really Need?

This is the question every small business owner eventually asks, and the honest answer is unsatisfying: it depends. There is no single 'right' number of backlinks for a UK small business, and anyone quoting a specific figure is either oversimplifying or selling you something.

What we can say with confidence is that quality always beats quantity. A newer site in a competitive niche, such as personal injury law or fintech, may need hundreds of high-quality links over time to compete. A local plumber or independent shop in a smaller town may only need a steady handful of well-chosen ones, perhaps a couple a quarter, to hold a respectable position. The variable is the competitiveness of the search results you are trying to appear in.

A useful mental model is to compare your link profile to the competitors who currently rank where you want to rank. If their pages have a handful of strong editorial links and yours has none, you have likely identified a gap. If their pages are crammed with thousands of low-quality directory submissions, that tells you a different story: you do not need to chase the same volume, just the better ones. The mistake to avoid is obsessing over a single number. Instead, focus on earning a small, consistent flow of relevant, editorial links over months and years. For a joined-up approach that covers both off-page and on-page work, our SEO optimisation services are worth a look.

Common Backlink Mistakes UK Small Businesses Make

A few patterns come up again and again when reviewing small business link profiles. None of them are subtle, and all of them are easy to avoid once you know what to look for.

• Buying cheap link packages. Anyone offering thousands of backlinks for a few pounds is selling you a basket of low-quality or spammy links. These can do more harm than good, and recovering from a bad link profile is far harder than building a clean one from scratch.
• Treating directories as a silver bullet. Submitting to dozens of business directories in a single weekend is no longer a useful strategy on its own. The major general directories and reputable industry-specific ones are worth a single careful submission each. Anything beyond that is usually noise.
• Reciprocal link schemes. 'You link to me, I link to you' arrangements were once common, and they still occasionally pop up in outreach emails. Search engines are very good at spotting link schemes, and they are not a path to sustainable ranking improvements.
• Pursuing links with no relevance. A backlink from an unrelated overseas forum to your accountancy practice in Bristol is not going to help you rank for 'accountant Bristol'. Relevance matters as much as authority.
• Ignoring internal links. While not technically backlinks, many small businesses underinvest in their own internal linking structure. A strong internal link graph helps search engines understand which of your pages matter most and can amplify the value of any external links you earn.

Practical Ways UK Small Businesses Can Earn Backlinks

Before chasing links, it is worth taking a quick look at what your site already has. Our tools page has a handful of free ways to run a basic backlink audit, which gives you a sensible baseline. From there, these are the most realistic approaches for UK small businesses, and the ones that tend to hold up over time.

• Publish original data or research. A short survey of your customers, or a piece of analysis on a topic in your sector, gives journalists and bloggers something to cite. It does not need to be huge: even a few surprising statistics can earn links from a handful of outlets.
• Pitch local press and trade publications. Local newspapers, radio station websites, and trade magazines are always looking for stories. A new product launch, a milestone, or a useful comment on a topical issue is often enough to start a relationship.
• Contribute guest articles to reputable sites. Look for industry blogs and trade publications that accept contributed content. A well-written expert article with a link back to a relevant resource on your own site is one of the cleanest ways to earn an editorial link.
• Get listed on supplier, partner, and association pages. If you supply other businesses, are accredited by a professional body, or sponsor a local organisation, ask if they will add you to their partners or members page. These are often overlooked but are easy wins.
• Answer journalist queries. Platforms that connect journalists with expert sources, including the UK equivalents of HARO, are worth a few minutes a day. The right answer can land a link from a major national outlet.
• Create a genuinely useful resource page. A free calculator, template, checklist, or guide that solves a real problem in your industry will attract links over time as people find it useful enough to share.
• Encourage customer reviews on third-party sites. Reviews on your Google Business Profile, reputable industry review platforms, and other trusted sites are not technically backlinks in the traditional sense, but they contribute meaningfully to your overall visibility.

The honest summary is that backlinks are a long game, not a quick fix. For most UK small businesses, a steady, sustainable approach focused on quality, relevance, and editorial merit will outperform any short-term scheme. Get the technical foundations right, produce work worth linking to, and the links tend to follow. More of the surrounding topics, from local SEO to content strategy, are covered in depth across the rest of our blog, which is a good place to keep reading once you have the basics in mind.