Link building is the work of earning links from other websites to your own pages. It has been part of SEO since Google began, and every year someone asks whether it still matters. The short answer is yes. The longer answer is that the importance of link building has changed: links carry less weight than they used to, quality now decides almost everything, and the sloppy tactics of the past will hurt you rather than help you. This guide explains what the research really shows, what a good link looks like in 2026, and how to build links without putting your site at risk.
What link building actually is
A backlink is a link from one website to another. When a site links to your page, it is telling its readers — and Google — that your page is worth a visit. Google built its first ranking system, PageRank, on this idea: a link works like a vote, and votes from pages that are themselves trusted count for more.
Link building is the process of earning those votes on purpose. That means creating content worth linking to, then letting the right people know it exists. It is not the same as placing links yourself on forums, directories and comment sections. Google can tell the difference, and only the earned kind helps.
The numbers: what the research really says
Large studies keep finding the same pattern. Pages with strong link profiles rank higher, get more traffic, and hold their positions longer. Here are the figures that matter most, drawn from Ahrefs and Backlinko:
| Finding | Source and sample |
|---|---|
| The #1 result in Google has 3.8x more backlinks than positions #2–#10 | Backlinko, 11.8 million search results |
| 96.55% of all pages get zero traffic from Google | Ahrefs, around 14 billion pages |
| 66.31% of pages have no backlinks at all | Ahrefs, around 1 billion pages |
| Only 2,997 of around 20 million pages with no referring domains get more than 1,000 search visits a month — about 1 in 6,671 | Ahrefs |
| Referring domains show the strongest link correlation with rankings (0.255), ahead of total backlinks (0.248) and Domain Rating (0.131) | Ahrefs, 1 million keywords, 2025 |
| Backlinks carry around 13% of Google’s algorithm weight, down from 15% in 2024 | First Page Sage |
| 93.8% of link builders say quality matters more than quantity | Authority Hacker, 755 link builders surveyed |
Two honest notes about these numbers. First, they show correlation, not proof that links cause rankings — strong pages attract links and rankings for many of the same reasons, and Ahrefs says so itself. Second, the weight of links is falling slowly. In March 2024 Google quietly changed its own documentation, dropping the word “important” from its description of links as a ranking factor, and Google’s Gary Illyes has said links have not been a top-three ranking factor for some time. Links still matter. They just matter less than they did, and only the good ones count.
Why links still move rankings
Google uses links for two jobs: finding pages and judging them. A link helps Google’s crawlers discover a new page, and it gives Google a reason to trust that page once it is found. That is why pages with no links at all so rarely get traffic — in Ahrefs’ study of around 14 billion pages, only 3.45% got any measurable search traffic, and pages with no referring domains almost never reached 1,000 visits a month.
What counts most is not the raw number of links. It is the number of different websites linking to you — your referring domains. Ahrefs’ 2025 study of 1 million keywords found referring domains correlated more strongly with rankings (0.255) than total backlinks (0.248), and far more than Domain Rating (0.131). Ten links from ten different sites carry more weight than ten links from one site, because each new domain is a separate, independent vote.
Top pages also keep gaining links. Ahrefs tracked 200,000 top-ranking pages and found that pages in position #1 typically gained new referring domains at 5% to 14.5% a month. Links build on links: a page that ranks gets seen, gets linked to, and ranks better. That is also why new pages find it hard to break in without any links at all.
Links do more than rankings
Rankings are only one reason links matter. A link from a site your customers actually read sends visitors directly to your page, and those visitors arrive already interested — research covered by Backlinko found traffic from backlinks converts better than paid traffic. A link from a respected publication also builds trust in your brand, because readers take the recommendation of a site they already trust.
Links now matter for AI search too. Ahrefs studied 75,000 brands and found that unlinked brand mentions correlated with AI Overview visibility at 0.664, against 0.218 for backlinks — mentions matter more for AI answers, but links are still the baseline of trust that gets a site into the pool of sources AI systems draw on. DataForSEO’s 2026 analysis of around 1.14 billion backlink URLs found referring domains correlated with Google AI Overview citations at 0.406 across 486,003 domains. Links alone will not get you cited, but a site with no link profile at all rarely gets picked.
What makes a link worth having
Not all links are equal, and the gap between a good link and a useless one is wide. A link is worth having when it is:
- Relevant. A link from a site in your field, or from a page about your topic, counts for far more than a link from an unrelated site.
- Editorial. The site chose to link to you because your content helped its readers — not because you paid, swapped, or placed the link yourself.
- On a real page with real traffic. A link buried on a page nobody visits, or on a site built only to sell links, passes almost nothing.
- From a trusted source. Links from established publications, industry bodies and well-known sites carry more weight than links from new or unknown domains.
One link with all four of these traits can be worth more than a hundred links with none of them. That is why 93.8% of link builders surveyed by Authority Hacker say quality matters more than quantity — and why counting links without checking them is a waste of time.
How to build links the safe way
Good link building is slow, manual work. There is no shortcut that lasts. These five steps are the core of it:
- Make something worth linking to. Original research, a clear guide, a useful tool or a strong opinion piece. Pages that teach something new earn links; thin pages written only to rank do not.
- Find the sites that already link to similar content. Use a backlink tool to see who links to the pages ranking for your topic. Those sites have already shown they link to this kind of content.
- Reach out with a real reason. Write to the person who runs the site, explain what your page adds, and suggest the exact place it fits. Expect most emails to go unanswered — Backlinko and Pitchbox analysed 12 million outreach emails and found only 8.5% got a reply. A short, polite follow-up lifts replies, so do not give up after one email.
- Use tactics that earn links honestly. Digital PR, broken link building, resource pages, and guest posts on real sites in your field all work. In Aira’s State of Link Building survey, 48.6% of experts rated digital PR the most effective tactic, ahead of guest posting at 16%.
- Track what you earn and keep it. Check new links each month, watch for lost links, and fix or replace the ones that break. A link profile needs looking after, not just building.
If you want this handled by a team that does manual outreach and earns links from real sites, take a look at our link building services.
What to avoid
Google’s spam policies are clear about what counts as link spam: creating links mainly to manipulate rankings. That includes buying or selling links for ranking purposes, excessive link exchanges, automated link-building programs, and low-quality directory or bookmark links. Google’s SpamBrain system has detected and neutralised unnatural links since the December 2022 link spam update, so those links now pass no ranking value at all — and a site caught using them can rank lower or disappear from results entirely.
Paid links are not banned outright. Google accepts that buying and selling links is a normal part of the web economy for advertising and sponsorship, as long as the link carries a rel=”nofollow” or rel=”sponsored” attribute. What breaks the rules is a paid link dressed up as an editorial one. Keep your link building honest, and you keep your rankings safe.
Frequently asked questions
Is link building still important in 2026?
Yes. Links remain part of Google’s ranking systems, and every large study still finds that pages with more referring domains rank higher and get more traffic. Their weight has fallen — from around 15% of the algorithm in 2024 to around 13% — and quality now matters far more than quantity. But no serious study shows links becoming unimportant.
How many backlinks do I need to rank?
There is no fixed number, because it depends on the keyword. For low-competition keywords, a handful of links from relevant sites can be enough. For competitive keywords, the pages on page one often have dozens or hundreds of referring domains. Count referring domains, not total links, and compare your page with the pages already ranking for your keyword.
Do backlinks help with AI search results?
Partly. Ahrefs found brand mentions correlate more strongly with AI Overview visibility (0.664) than backlinks (0.218), but referring domains still correlate with AI Overview citations at 0.406 in DataForSEO’s 2026 analysis. Links are best seen as the trust baseline that gets your site considered as a source, while mentions and brand searches do more of the work in AI answers.
Is it safe to buy backlinks?
No. Buying links for ranking purposes is link spam under Google’s spam policies, and Google’s SpamBrain system has neutralised unnatural links since December 2022, so bought links pass no ranking value. Worse, they can trigger a manual action or an algorithmic drop. If you pay for a link for advertising, it must carry rel=”sponsored” or rel=”nofollow”. Earn links instead.
How long does link building take to work?
Usually weeks to months. Google has to crawl the linking page, count the link, and weigh it against everything else. Top-ranking pages typically gain new referring domains at 5% to 14.5% a month, so the effect builds slowly. Anyone promising instant ranking jumps from links is selling something Google will undo.
What is the difference between a backlink and a referring domain?
A backlink is a single link pointing to your site. A referring domain is a unique website that links to you. If one site links to you ten times, that is ten backlinks but one referring domain. Referring domains matter more for rankings, because ten links from ten different sites are ten independent votes, while ten links from one site are one voice repeated.
Abdullah Zulfiqar is Co-founder and Client Success Manager at RankWithLinks, an SEO agency helping businesses grow online. He specializes in client relations and SEO strategy, driving measurable results and maximizing ROI through effective link-building and digital marketing solutions.