Link Building Strategies That Pass Google's Rules

Link building strategies are the methods you use to get other websites to link to yours. The ones that still work in 2026 have one thing in common: they give another site a genuine reason to cite you, and they would make sense even if search engines did not count links. The ones that do not work are, almost exactly, the list in Google’s link spam policy.

This guide is for business owners and marketers deciding where to spend link building effort. It sorts the common strategies into allowed, conditional and prohibited using Google’s own policy text, walks through the seven strategies worth your time, and explains why unlinked brand mentions now matter as much as links for AI answers. If you need the basics first, start with what backlinks are.

On this page

• What Google actually prohibits
• The link building strategies that still work
• Which strategies are allowed, conditional or spam?
• Links vs mentions for AI answers
• How do you choose the right strategy?
• Where link building goes next for your site

What Google actually prohibits

Google defines link spam as “the practice of creating links to or from a site primarily for the purpose of manipulating search rankings.” Its spam policies then list the practices it counts, which include:

• buying or selling links for ranking purposes, including exchanging goods or services for links, or sending someone a product in exchange for a write-up with a link
• excessive link exchanges (“Link to me and I’ll link to you”) or partner pages that exist only for cross-linking
• advertorials that pass ranking credit, and “links with optimized anchor text in articles, guest posts, or press releases distributed on other sites”
• text ads or text links that do not block ranking credit
• automated programs or services that create links
• requiring a link as part of a terms of service or contract without letting the owner qualify it
• low-quality directory or bookmark site links
• keyword-rich, hidden or low-quality links embedded in widgets and distributed across sites
• widely distributed links in site footers or templates
• forum comments with optimized links in the post or signature
• low-value content created primarily to manipulate linking and ranking signals

The same page is explicit that paying for links is not a problem in itself: “buying and selling links is a normal part of the economy of the web for advertising and sponsorship purposes,” and such links are fine when they carry rel="nofollow" or rel="sponsored". The violation is paying for a link that passes ranking credit.

Google also says links are one of its signals: it “uses links as a signal when determining the relevancy of pages and to find new pages to crawl,” per its link best practices. So links matter, and manipulating them is spam. Both are true.

Enforcement is mostly algorithmic. In its December 2022 link spam update, Google said SpamBrain can detect sites buying links and sites used to pass outgoing links, and neutralize them. The practical risk of a bought link is usually not a penalty. It is paying for something that silently counts for nothing.

Paid and sponsored placements are legal when labeled. Google’s guidance on qualifying outbound links asks sites to mark “links that are advertisements or paid placements” with rel="sponsored", and user-generated links with rel="ugc". Our guide to nofollow links covers the attributes in detail.

The decision tree below is the whole policy reduced to three questions.

The link building strategies that still work

Seven strategies consistently earn editorial links without touching the policy line. Each starts with an asset worth citing, because most content earns no links at all: a 2019 Backlinko and BuzzSumo analysis of 912 million blog posts found 94% had zero external links.

1. Original data and research

Publish numbers nobody else has: a survey of your customers, an analysis of public data, benchmarks from your own work. Journalists and bloggers need sources, and a statistic with your name on it gets cited for years. The same Backlinko study found “why” posts, “what” posts and infographics earned on average 25.8% more referring domain links than how-to posts and videos, which fits: reference material gets cited, instructions get followed.

2. Digital PR and expert commentary

Offer journalists what they need on deadline: a qualified expert, a clear quote, a relevant data point. This earns links from news and trade sites that no outreach email will. We cover how this feeds AI answers in digital PR for AI search.

3. Resource page outreach

Many sites keep curated lists of useful resources for their readers: associations, universities, local chambers, industry groups. If you have a genuinely useful guide or tool on that subject, ask to be considered. Relevance is the whole game here.

4. Unlinked brand mentions

Search for your brand, founders and product names on the web, and find mentions without a link. A short, polite note asking the author to link the mention for readers converts often, because the editorial decision to mention you is already made. Even the ones that stay unlinked still count for AI, as the next section explains.

5. Broken link replacement

Find pages in your niche that link to resources that no longer exist, then offer your equivalent. You are fixing a problem for the site owner, which is a better pitch than asking a favor.

6. Useful tools and calculators

A free calculator, checker or template earns links from people who recommend it to their own audience. It needs maintenance, and it needs to actually be useful, but a good tool can outlast a decade of blog posts.

7. Real-world relationships

Suppliers, partners, associations, sponsorships of local events, speaking slots. These produce links as a side effect of real activity. For local businesses, these links and local citations do most of the work.

Which strategies are allowed, conditional or spam?

Most tactics are not good or bad in themselves; the method and scale decide it. This table sorts the common ones against the policy text above.

Anchor text deserves its own mention. Keyword-rich anchors across many placed links are one of the clearest patterns in the policy. Editorial links usually carry your brand name, a URL or a natural phrase. See anchor text for what a healthy profile looks like.

Links vs mentions for AI answers

For AI answers, a brand mention without a link appears to matter more than a link without a mention. That changes what you count as a win.

In an Ahrefs study of 75,000 brands published in May 2025, the factor most correlated with a brand’s visibility in Google AI Overviews was branded web mentions, at 0.664. The number of backlinks correlated at 0.218. The top three factors were all off-site. Correlation is not causation, and the study measured one AI surface, but the gap is large.

The mechanism is plausible. Language models learn and retrieve text, not link graphs. A sentence on a trusted site that says “Acme is a leading supplier of X” associates your name with the subject whether or not “Acme” is a hyperlink. We go deeper in how AI engines choose citations.

What this means in practice:

• Count mentions, not just links. Track brand mentions on relevant sites as a KPI alongside referring domains.
• Do not abandon a pitch because the site will not link. A mention in a trade publication that never links out is still worth having.
• Links still matter for ranking, and ranking still gates which pages AI systems retrieve. Keep building both.

How do you choose the right strategy?

Choose by the asset you already have, not by the tactic that sounds best. Every strategy above needs something specific underneath it, and the fastest wins come from using what exists.

A few rules of thumb from that matrix:

• Start with mention reclamation if you have any press at all. It is the cheapest link you will ever earn.
• Invest in data if you want links for years. A good dataset gets cited long after a campaign ends.
• Look at who links to competitors. A backlink gap analysis shows which sites link to your rivals but not to you, and which assets earned those links. Our guide to SEO competitor analysis covers the method.
• Stay on topic. A handful of links from sites about your subject does more than dozens from unrelated ones, and it supports your topical authority.

Where link building goes next for your site

Link building now has two scoreboards. Links still help pages rank in Google, and rankings still decide which pages AI systems retrieve. Mentions, linked or not, increasingly decide whether AI answers name your brand at all. The strategies that win both are the same: publish something worth citing, then make sure the right people see it.

Before you spend on any tactic, run it through the three questions in the decision tree. If money changes hands, label it. If it is automated or templated, skip it. If the link would not exist without search engines, reconsider.

If you want a plan that connects the assets you already have to the sites and mentions that would move your visibility in search and AI answers, that is part of our AI SEO service.