Published by Waqas Nasir
If you’ve spent any time learning about Search Engine Optimization (SEO), you’ve inevitably heard the term “link building.” It’s spoken about as one of the most important and challenging parts of getting your website to rank higher on search engines.
But what is it, really?
Link building in SEO is simply the practice of getting other websites to link to yours so that search engines see your site as more trustworthy, relevant, and worth ranking.
Fair… But why do links still matter when Google talks so much about “helpful content,” and how do you build links without playing risky games with your domain?
Let’s break down what link building is, why it’s non-negotiable for SEO, the key terms you need to know, and the best “white-hat” strategies to start earning links today.
Each link from another site to yours is called a backlink. When those links come from relevant, reputable sites, search engines treat them like votes of confidence that your content is worth showing to more people.
Before we deep dive into link building, you need to understand the basic mechanics.
There are three types of links you’ll encounter in SEO.
You need all three. Internal links make the most of the authority you already have. Inbound links (backlinks) bring new authority in. Outbound links show you’ve done your research and are connecting readers to other credible sources, which is a positive signal for Google.
The world of link building has its own language. Here are the core terms you’ll hear.
Referring domain
A website that links to you. One domain can send you one backlink or hundreds.
**Anchor text
**This is the clickable, visible text of a hyperlink. For example, in the link learn more about SEO, the anchor text is “learn more about SEO.”
**Dofollow vs. Nofollow Links
**This is a crucial concept.
**rel="nofollow"**): This is a small piece of code added to a link to say you’d rather not vouch for the page it points to. Since 2019, Google has treated it as a hint rather than a strict rule, and it introduced two more specific values, sponsored (for paid links) and ugc (for comments and forum posts). See our guide to link rel attributes.**Link Equity (or “Link Juice”)
**This is a simple analogy for the “power” or “authority” a link passes from one page to another. Think of it this way: a link from a major, trusted site like The New York Times has far more link equity than a link from a brand new, unknown blog.
**Domain Authority (DA) / Domain Rating (DR)
**These are third-party metrics (from companies like Moz and Ahrefs, not from Google) that estimate a website’s overall authority on a scale of 0-100. While not a direct ranking factor, DA/DR is a helpful shortcut to gauge the potential quality of a site you want a link from.
Think of SEO as three big buckets:
Link building lives in that third bucket.
Google says it uses links as a signal when determining the relevance of pages and to find new pages to crawl. In practice, links help in three ways:
So even if your content is solid, you are still competing with sites that have solid content and stronger link profiles. That is why so many brands eventually decide to invest in link building.
The data points the same way. Backlinko analyzed 11.8 million Google search results and found that the #1 result has, on average, 3.8x more backlinks than positions #2 through #10 (updated April 2025). That’s a correlation, not proof that links cause the ranking, but it shows why links matter. Google’s Gary Illyes put it well at PubCon in 2023: links are important, but people overestimate their importance, and it’s possible to rank without them.
How links are built in general
Natural links
These happen when you publish something useful or newsworthy, and people discover and link to it on their own. No direct outreach, no ask.
Built links
These are still editorial, but you did some work to make them happen. For example, you pitched a guest article, responded to a journalist, or showed a better resource to someone already linking to weaker content.
Self created links
These include most low quality profiles, comment links and forum signatures. They are easy to manipulate, so modern algorithms discount them heavily, especially at scale.
Modern link building focuses on natural and built links, not on dropping your URL into every directory you can find.
Not every backlink is helpful. Some are neutral. Some are actively risky.
A strong SEO link usually checks most of these boxes.
The linking website and the specific page should make sense for your topic.
If you run an SEO agency, a contextual mention on a serious digital marketing blog is far more useful than a random link from a coupon site. Relevance is a big part of link quality.
We unpack relevance, metrics, and risk in more detail in guide, understanding link quality and website metrics.
Authority is not just a DA or DR number. It looks like:
If a site is built only to sell links, and every article is a thin advertorial, its “authority” is fragile at best.
The best backlinks can send real visitors, not just theoretical “link equity.”
If your link sits in a guide that ranks for relevant keywords and gets traffic, you win twice:
Links in sidebars, author bios, or huge “partners” pages carry less weight.
Links that are integrated into the main body of an article, surrounded by text that explains why the link is there, usually carry more ranking power. These are called contextual links.
If you want to go deep into this specific angle, we have a full guide on contextual links and best practices coming from our campaigns.
Anchor text is the clickable part of the link.
A natural backlink profile usually includes:
Problems start when every link is an exact match money keyword. That pattern looks engineered rather than earned.
One thing we do on almost every campaign is a quick website audit before active link building starts.
During this audit you:
Sometimes the best “link building” move is to turn a weak page into the strongest guide on the topic, then start outreach once it is genuinely worth linking to.
There are lots of fancy names for tactics. Underneath, most ethical white hat link building falls into a few simple patterns.
The boring truth: link building becomes much easier when you have pages that deserve links.
Think about:
Some formats are especially good at earning organic backlinks over time:
These pieces behave like link magnets. Outreach helps, but strong assets can attract backlinks for months or years.
Once you have your asset, you have to tell the world about it. “Build it and they will come” does not work in SEO. You must go out and get the links.
A classic way to earn backlinks. You provide genuinely useful content to another site’s audience and, in return, earn a relevant, contextual link in your byline or within the article.
Don’t do it just for the link. Focus on high-authority, relevant sites in your niche. Write your absolute best content, and aim to provide genuine value to their audience.
Instead of writing a full article, you get your link added into an existing relevant article.
This works well when:
For example, if a blog has a guide about “remote team management” and you have a strong article or product that fits into that topic, your link can be added as a recommended resource.
Think beyond classic “SEO blogs”:
These links are harder to get but often become your most valuable assets.
Alongside classic guest posting and manual outreach, most campaigns draw from a handful of proven tactics:
You do not need to use every tactic at once. The right mix depends on your niche, your resources and how strong your current content is.
Now the other side of the story. Some tactics might still work in the short term, and some quietly push you toward a manual action or just burn budget. Google’s spam policies (updated August 2026) list several of them as link spam: buying or selling links for ranking purposes, excessive link exchanges, automated link creation, low-quality directory links, widely distributed footer or widget links, and forum comments with optimized links. Watch out for these.
Offers that promise dozens or hundreds of high DA links for a tiny fee usually rely on low quality networks. They often leave clear footprints that can be picked up by spam systems.
We go into the nuance of when paying publishers makes sense, and when it does not, in our guide on buying backlinks.
Expired domains rebuilt into look-alike blogs with generic content and no real brand. These are clusters of sites created mainly to pass link equity. They usually look fine on the surface but share patterns in ownership, hosting, templates or interlinking that make them risky long term.
If most of your backlinks use the same exact money keyword, it is not a natural pattern.
Healthy sites tend to attract a mix of branded, partial match and generic anchors, simply because different authors describe them in different ways.
Slack/FB “you link to me, I link to you” groups, link wheels, and partner pages created only for cross-linking. Google’s spam policies explicitly call out excessive link exchanges.
Automated comments, empty forum profiles, and random signature links. They’re usually nofollow, send no real traffic, and make your promotion footprint look spammy.
Hundreds of “SEO directories” with zero editorial review or real users. They clutter your link graph without adding trust or relevance.
AI/spun articles published in bulk across weak sites just to host outbound links. No real readership, no value – and increasingly easy for Google to ignore or downrank.
Followed “SEO by X” links in thousands of footers or widgets. Non-editorial, sitewide, commercial anchors are classic manipulation signals.
Links from totally unrelated niches (e.g., crypto blog linking to a dentist). A pattern of irrelevant links screams “paid” rather than earned.
How do you know if all this hard work is actually paying off? Don’t just count the number of links. Focus on these key metrics.
Are you attracting more unique domains that are relevant and healthy, not just more links? You want to get more links from more unique, high-quality websites.
Watch how search traffic evolves on the pages you are actively supporting with backlinks. It rarely moves in a straight line, but you want to see a clear upward trend over months, not days.
Are your target pages (the ones you’re building links to) climbing up the search results for their target keywords? Rank trackers help, but even Search Console can give you a decent picture.
Ultimately, link building should support business outcomes. You should have started getting more business from organic search than before.
You can also keep an eye on third-party authority metrics like DA/DR; they’re not ranking factors, but they often tick up as you earn high-quality links.
If you are not sure how to connect backlinks to results, our guide on how to measure the success of a link building campaign walks through a simple framework.
Most teams start link building in house. You write a few guest posts, send some outreach emails, land a couple of backlinks and it feels manageable.
It usually gets hard when you need link building to be consistent, not just “whenever we find time.”
Here are clear signs it might be better to bring in specialist help:
If you need consistent, vetted backlinks in multiple markets, let’s talk. Share your site, target countries and priorities, and we’ll come back with a clear, practical approach to take the burden off your shoulders.
Yes, with caveats. Helpful, high-quality content comes first. In competitive spaces, links still help, and Google’s own documentation says it uses links as a signal. But Google’s systems have moved from counting links to judging their quality and relevance, and Google has said links are overestimated in importance.
Sometimes. For very low-competition, long-tail keywords with little competing content, yes. Ahrefs found that about 20 million pages in its index have no referring domains at all, yet a small number still get over 1,000 visits a month, typically on low-competition topics on established sites.
For valuable, competitive topics, it is rare to rank well in a sustainable way without earning links, even if you never run “active link building campaigns” and instead rely on strong content and brand marketing.
There is no magic number.
A better approach is to:
Nobody can promise that a link will get you cited by an AI tool. Ahrefs studied 75,000 brands in December 2025 and found that brand mentions across the web correlate with visibility in AI Overviews (0.656), ChatGPT (0.664) and AI Mode (0.709), and that link and content volume had little impact on AI visibility. Google itself says there are no special optimizations needed to appear in its AI features. So the practical advice is the same: earn mentions and links on relevant, trusted sites, and make your own pages worth citing.
If you want a deeper, more strategic view, read our full guide on the future of link building in an AI-first world.
Link building is no longer about tricking Google. It’s about earning trust.
At its best, link building is the process of building a strong brand, creating content that is genuinely valuable, and fostering real, human relationships within your industry. It’s a marathon, not a sprint. Focus on quality over quantity, be patient, and aim to create a website that people want to reference and link to. That’s the real secret to sustainable, long-term SEO success.
Checked on 30 September 2026.
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