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Link building is the practice of getting other websites to link to pages on your website, so that search engines treat those links as votes of confidence and rank your pages higher. This guide covers how those votes are counted, which types of links are worth building, what they cost, and how to measure whether they're working. Everything in it comes from placing 650+ links a month for UK businesses over eight years.
Link building is the deliberate process of earning hyperlinks — usually called backlinks — from other websites to your own pages. Google's own documentation describes links as one of the signals it uses to determine what a page is about and how prominently it should rank. From here on we'll simply say "link": a clickable connection from a page on one website to a page on another. Search engines discovered early that pages accumulating links from many independent websites tend to be the pages people find useful, and that insight — formalised in the PageRank algorithm — still shapes how rankings work today.
When another website links to one of your pages, search engines read that link as a vote of confidence. The more relevant the source, and the higher the authority of the page hosting the link, the more weight that vote carries — and the higher you climb in search results for the terms that matter to you.
The clickable text that creates the link — the anchor text — tells search engines what your destination page is about. Descriptive, on-topic anchor text helps engines understand context; over-optimised, exact-match anchors trigger penalties. A guest posting placement on a respected industry blog, with relevant anchor text, will outperform dozens of generic forum mentions every time.
A dofollow link passes authority from the hosting page to yours; a nofollow link tells search engines not to pass it. Nofollow links still have a role — for brand visibility and referral traffic, the real visitors who click through from the source page — but they don't pass link authority directly to your site. That's the mechanics. The art is knowing which pages on which sites are worth chasing, and which to walk away from. After eight years and several hundred thousand links placed, that's where we earn our fee.
Links remain one of the strongest ranking factors search engines use, because they are the one signal a website cannot generate for itself. Google's Search Essentials still lists links among the ways its systems find and evaluate pages, and independent research keeps confirming the correlation: Backlinko's analysis of 11.8 million search results found the top-ranking page averages 3.8× more backlinks than positions two through ten. Rankings are the visible effect; the underlying one is authority. Every link from a new referring domain is historical evidence that an independent publisher judged your page worth citing — and search engine rankings compound on exactly that evidence.
Not every link is worth having. After eight years of placements, we've narrowed our methods to the ones that consistently move rankings — and we steer clear of the rest.
Long-form, useful articles published on sites your target audience actually reads. Written by us, signed off by the editor, with a single relevant link back. This is where most of our budget goes — guest posting on respected publishers and trade bloggers is still the most defensible link in 2026.
Original research, surveys, infographics and data stories pitched to journalists and bloggers covering your niche. One mention from a national publisher beats fifty mid-tier directory listings, and the brand mentions that come with it lift trust signals on top of the link itself. Co-created content marketing with influencers and creators in your space works the same way: the link is the by-product, the audience reach is the point.
Carefully chosen industry directories where your target audience genuinely searches — chambers of commerce, trade associations, vetted vertical directories. Used sparingly, these reinforce search engine optimization fundamentals without bloating your link profile.
Link farms, private blog networks (PBNs), mass blog comments and paid hyperlink schemes trade volume for relevance — and they are the techniques Google's Penguin update was built to detect. Legitimate niche edits — links added editorially to existing, relevant, indexed articles — are a different thing entirely from the automated link insertions these schemes sell. The test is simple: if a link can be bought by anyone, for pennies, at any volume, search engines have already learned to ignore it.
Link building is done by prospecting relevant websites, vetting their quality, pitching a placement, publishing the link, and verifying it stays live. In practice:
The order matters less than the discipline: a documented link building strategy that fixes your target pages and anchors before outreach starts is what separates campaigns from link shopping.
Link building is measured by the rankings, referring domains and referral traffic it produces — not by the number of links built. A campaign that adds twenty links from twenty new referring domains will move rankings further than a hundred links from the same three websites, because search engines count each new domain as an independent vote. Track three numbers monthly: referring domains to the target page, the target page's position for its main keyword, and referral traffic from the placed links. If all three are flat after four months, the links are the wrong links. For a deeper breakdown of the link building metrics worth tracking, we've published a full guide.
PageRank is Google's own algorithm for scoring a page by the quantity and quality of links pointing at it; Domain Authority is a third-party estimate of the same idea, built by Moz because Google stopped publishing PageRank scores in 2016. Neither is a ranking factor you can buy directly — both are proxies for how much link equity a page or domain has accumulated. Use third-party metrics to compare candidate sites against each other, not as absolute truth: a DA 40 site with real traffic and topical relevance beats a DA 60 site with neither.
| Metric | Who makes it | What it measures | Scale |
|---|---|---|---|
| PageRank | Link equity of a single page (internal since 2016) | logarithmic, unpublished | |
| Domain Authority (DA) | Moz | Predicted ranking strength of a whole domain | 0–100 |
| Domain Rating (DR) | Ahrefs | Strength of a domain's backlink profile | 0–100 |
| URL Rating (UR) | Ahrefs | Strength of a single page's backlink profile | 0–100 |
Google Penguin was an algorithm update, launched in April 2012, that penalised websites with manipulative link profiles instead of merely ignoring the offending links. Penguin targets exact-match anchor text stuffing, paid link schemes and link farms — the tactics that once made cheap link building work. Since 2016 Penguin has run inside Google's core algorithm in real time, which means link penalties arrive and lift continuously rather than in named update waves. The practical consequence for anyone measuring link building: relevance and anchor-text diversity are safety metrics, not niceties. A link profile where most anchors are brand names and page titles, with commercial anchors used sparingly, is what a natural citation pattern looks like — and it is the pattern Penguin was built to protect.
An editorially placed link costs between $298 and $444 on our current rate card, depending on the Domain Rating of the site hosting it and the placement type. Like most of the link building market, UK agencies included, we price in US dollars. These are the exact rates we charge across the 650+ links we place every month:
| Site authority | Guest post | Niche edit |
|---|---|---|
| DR 30+ | $358 | $298 |
| DR 45+ | $396 | $336 |
| DR 60+ | $444 | $384 |
Guest posts cost more than niche edits at every authority band because a guest post includes a full article written, pitched and placed, while a niche edit adds a link to a page the host site has already published. Two things move the price from there. Volume is the first: committed monthly campaigns typically earn around a 10% discount, and agencies buying white-label get 30% off rate card. Niche is the second: finance, health and legal placements carry a premium because their editors take on compliance risk with every outbound link. What the table can't show is what a cheap link really costs — a link anyone can buy for $15 is one Google has already learned to discount, because the sites selling them are the link farms and PBNs described earlier. Budget for fewer, better placements. Most clients fix their cost per link in advance with monthly link building packages.
Yes — links still matter for AI search, but their job has changed: AI answer engines use links and brand mentions to decide which sources deserve to be cited, rather than to order ten blue results. When ChatGPT, Perplexity or Google's AI Overviews answer a question about your industry, they synthesise a handful of sources and name them. Which sources get named correlates with the same authority signals links have always built: how often a domain is referenced, by whom, and in what context.
Three practical shifts follow. Unlinked brand mentions now carry weight, because language models read text rather than link graphs — a named citation in a respected publication helps even without a hyperlink. Definitional, directly-quotable content gets extracted, which is why every section of this guide opens by answering its own heading. And authority concentrates: AI answers cite two or three sources where a results page listed ten, so the gap between cited and invisible is wider than the old gap between position one and position ten.
Link building is how a website earns its way into that citable minority — the discipline is now sometimes called generative engine optimisation, and it starts from the same place it always has: being the source other sources point to.
