What is link building?
Link building is the practice of getting other websites to link to yours. Each of these links (a "backlink" from your perspective) is a public reference: another site telling its readers, and search engines, that your page is worth visiting.
Think of academic papers. A paper cited by hundreds of other researchers carries more weight than one nobody references. Search engines apply the same logic to websites. Counting links as votes is the idea behind Google's original PageRank algorithm, and links have remained a core ranking signal ever since.
Why it matters for your rankings
A backlink does three things for you:
It transfers authority. Search engines treat a link from an established site as a vote of confidence. Part of that site's credibility rubs off on yours. This accumulated trust is why two pages with similar content can rank very differently.
It confirms relevance. A link from a trade association to a member business, or from a cooking magazine to a knife maker, tells Google what your site is about and who vouches for it in that field.
It gets you discovered. Crawlers find new pages by following links, and readers of the linking page click through directly. A good backlink brings visitors before it moves a single ranking.
Not all links count equally. What matters is the authority of the linking site, how closely its topic matches yours, and where the link sits. A link placed inside an article, with descriptive anchor text, counts far more than one buried in a footer. A single editorial link from a respected industry publication can outweigh dozens of directory entries.
Links can also carry attributes that change how they pass value:
<a href="https://example.com/" rel="sponsored">Paid placement</a>
<a href="https://example.com/" rel="nofollow">Not an endorsement</a>
rel="nofollow", rel="sponsored" and rel="ugc" tell Google not to treat the link as an editorial vote. Paid placements must be marked this way.
How it actually works
Sustainable link building means creating reasons for other sites to reference you:
Digital PR. Give journalists and bloggers something worth covering: original data, expert commentary, a story about your business. Coverage in trade press or local media usually comes with a link.
Linkable assets. Guides, studies, calculators and tools that others reference because they are genuinely useful. These earn links over years, not weeks.
Guest articles. Writing for relevant publications in your industry, with a link back to your site in a natural context.
Directories and associations. Entries in moderated, relevant directories: industry associations, chambers of commerce, established local portals. A handful of good ones helps; hundreds of random ones do nothing.
Partners and suppliers. Companies you already work with often link to you if asked. These links are easy to get and topically credible.
What to avoid: bought link packages, private blog networks, mass link exchanges and spun guest posts. Google's link spam updates devalue these links automatically, and a manual penalty can remove a site from the results entirely. Recovery takes months.
Link building in AI search (GEO)
AI assistants like ChatGPT, Perplexity and Google's AI Overviews answer questions directly and cite a handful of sources. Generative engine optimization (GEO) is the practice of becoming one of those sources, and it changes what "a link" is worth in three ways.
Links still gate retrieval. Most assistants search the web at answer time and read the top results. Which pages make that shortlist is decided largely by classic search rankings, where link authority is a major input. A study of 120,000 queries by Botify and DemandSphere found that 75% of the pages cited in Google's AI Overviews already rank in the top 12 organic results. A weak backlink profile keeps you out of AI answers the same way it keeps you off page one.
Mentions matter even without links. AI models learn about brands from text across the web. An unlinked mention in a widely read article still shapes what an assistant says about you. The data is striking: Ahrefs analyzed 75,000 brands and found that branded web mentions correlate with AI visibility at 0.66, while backlink counts correlate at only 0.22. Mentions on YouTube were the strongest single signal at 0.74. In classic SEO an unlinked mention was a missed opportunity; in GEO it is a result in itself.
Third-party pages become the target. AI answers lean on comparison articles, review platforms, forums and trade press. Getting your business named in the pages assistants already cite is the GEO equivalent of earning a backlink.
In practice the work converges: the same digital PR that earns a backlink also earns the mention an AI assistant repeats.
How webentity handles this
Every webentity audit measures your domain authority, compares your backlink profile against competitors, and probes AI assistants with real customer questions to see whether they mention you or cite your pages. Backlink building itself is available as a separate add-on: we source, vet and place links with quality DACH publishers, and you see every placement. The site provides the technical foundation, so the authority you earn turns into rankings and citations instead of leaking away.