Most link building reports count things: links, domains, authority scores. They rarely ask the question that matters more and more for search and AI visibility: when your brand is mentioned, who else is mentioned next to it, and what words surround it? A payroll startup linked from a list of "best accounting tools for freelancers", next to three well-known brands, sends a different signal from the same startup linked from a sidebar of a casino blog. The link counts the same in a tool. The context does not.
Co-citation and co-occurrence are the names SEOs use for those contextual relationships. Neither is a confirmed Google ranking factor with a published formula. But Google says plainly that it uses links and the words around them to understand what pages are about. Large language models also learn associations from which names appear together in text. For a brand trying to be seen as part of a category, appearing in the right company, in the right sentences, is now a practical goal.
This guide defines both terms, explains what Google has and has not said about context around links, shows why sitting beside category leaders matters, gives a step-by-step plan to get into the lists and comparisons that shape associations, covers unlinked mentions, and suggests ways to measure contextual association without pretending to more precision than exists.
Co-citation and co-occurrence, defined without the jargon
The two terms are often used interchangeably, but they describe different things.
- Co-citation is when two sites or pages are referenced by the same third page, even though they do not link to each other. If page C links to both A and B, A and B are co-cited. Repeat that across many pages and an association forms between A and B. The idea comes from bibliometrics: Henry Small proposed co-citation as a measure of how closely related two scientific papers are in 1973. Two papers frequently cited together are likely about related subjects.
- Co-occurrence is when terms appear together, or close to each other, across many documents. Your brand name repeatedly appearing near "invoice automation" or "small business accounting" builds an association between the brand and that topic, whether or not there is a link.
“Rather than associate two sites together, co-occurrence builds relationships based on similar keywords and phrases.”
— Semrush Blog, Link Building: What Are Co-citation and Co-occurrence?
| Concept | What is related | Needs a link? | Example |
|---|---|---|---|
| Co-citation | Two entities (sites, brands, pages) | Usually discussed with links, but mentions can play the same role | A roundup linking to your tool and two market leaders |
| Co-occurrence | An entity and a topic, or two terms | No | Articles that repeatedly mention your brand alongside "warehouse management" |
| Anchor text | A link and the words used to describe it | Yes | "cloud payroll software" as the clickable text pointing to you |
| Surrounding text | A link and the sentence or paragraph around it | Yes | "For freelancers who invoice in several currencies, [Brand] is the simplest option." |
The terms became popular in SEO around 2012, when Rand Fishkin of Moz argued that co-citation would take over some of the role anchor text had played, as Semrush recounted in its 2015 article on the topic. The context has changed since then. Search engines and AI systems now understand language and entities far better, which makes the underlying idea more relevant, not less.
What Google has actually said about the context around links
Google has not published a "co-citation" signal. It has, however, been clear that links are used to understand meaning and that the text around a link matters.
“the words before and after links matter, so pay attention to the sentence as a whole.”
— Google Search Central, SEO link best practices for Google
The same page says Google uses links as a signal when determining the relevancy of pages. Google's guide to its ranking systems describes link analysis systems as ways to "understand how pages link to each other as a way to determine what pages are about". It also describes neural matching as an AI system used to understand representations of concepts in queries and pages.
Put together, the reasonable reading is this:
- Google uses links and their surrounding text to understand what a page is about, not only how important it is.
- Google's language systems understand concepts and entities, so a brand repeatedly described in a certain context is easier to associate with that context.
- How exactly any of this is weighted is not public, and anyone who gives you a co-citation "score" that Google uses is guessing.
That is enough to act on. You do not need a confirmed factor to see that appearing in relevant, well-written content beside the right companies is better than appearing in random, irrelevant places. Our guide to anchor text covers the clickable-text side of this.
Why AI assistants make this more important
Large language models learn from patterns in text, including which names appear together and in what context. When someone asks an AI assistant for "the best tools for X", the answer reflects which brands have been written about together in that context, often enough and in credible places. Retrieval-based features add live search results on top. Google says its AI features may issue "multiple related searches across subtopics and data sources", so being present in many relevant sources raises your chances of being included.
Google also says there are no special requirements or optimisations for its AI Overviews and AI Mode beyond normal SEO. That supports the view that association-building is ordinary, good off-page work rather than a new trick. Our guides to AI brand visibility and finding AI search competitor gaps go deeper on the AI side.
Why being mentioned beside category leaders changes how you are understood
A new brand has a classification problem. Search engines, AI systems and people do not yet know what category it belongs to or how it compares. Each time an independent source mentions it in the same breath as established players, it helps solve that problem.
- Category membership: repeated co-mentions with "Xero, QuickBooks and FreshBooks" tell systems your brand is accounting software, not a consultancy with a similar name.
- Positioning: appearing in "best for freelancers" lists and not "enterprise" lists tells people which segment you serve.
- Credibility: readers assume a list's editor has judged the included brands worth comparing.
- Retrieval: when AI tools or searchers look for alternatives to a leader, pages that mention you beside that leader are where they find you.
The same logic works in reverse. Being consistently mentioned alongside low-quality or spammy brands, or in irrelevant contexts, is not the association you want. That is one reason bulk link schemes and irrelevant placements are a poor fit with this strategy. They also run into Google's link spam policies. For new brands specifically, see our guide to AI visibility for new brands.
Getting into the lists, comparisons and roundups that shape associations
The highest-value co-citation opportunities are pages that already rank and are already read: "best X" lists, comparison articles, alternatives pages, industry reports and resource pages. Here is a step-by-step process.
A seven-step co-citation campaign
- List your category's core queries. "best [category]", "[category] for [segment]", "[leader] alternatives", "[leader] vs". Include the prompts customers might type into AI assistants.
- Collect the pages that appear for them. Note the top 10 to 20 results per query, plus the sources AI answers cite. Ignore your own site and direct competitors' sites.
- Record which brands each page mentions. A simple sheet with page, query, brands included, whether you are included and how each brand is described.
- Prioritise pages that mention two or more of your direct competitors but not you. These are the clearest gaps. Our link prospecting guide shows how to score and organise them.
- Make inclusion easy and fair. Contact the editor with a short, factual case: what you do, who it suits, how you differ, and access to a trial or demo. Offer data or a screenshot they can use. Never ask for a paid placement that is not labelled as such.
- Create your own comparison content. Honest comparison and alternatives pages on your site put your brand beside leaders in your own words. Our guide to surround sound SEO applies the same idea to whole results pages.
- Re-check every quarter. Lists are updated, new ones appear, and AI answers shift. Track gains and losses in the sheet.
Which page types are worth the effort
| Page type | Association value | Effort to get included | Notes |
|---|---|---|---|
| Independent "best of" lists on trusted publications | High | High | Editors need evidence and often test products |
| Review platforms and category pages (G2, Capterra-style) | High for software and services | Medium | Requires real customer reviews |
| Industry reports and market maps | High | Medium to high | Often need survey participation or analyst briefings |
| Expert roundups and podcasts | Medium | Low to medium | Puts your people beside leaders' people; see our guide to expert roundups |
| Association and resource pages | Medium | Low | Good for local and niche businesses |
| Generic directories and link lists | Low | Low | Little context; some are low quality |
Digital PR that creates co-mentions on purpose
Original data is one of the most reliable ways to earn mentions beside leaders. If you publish a benchmark that includes the category leaders' public data alongside yours, every journalist who covers it will mention your brand next to theirs. Our guide to digital PR for SEO covers campaign design.
Unlinked mentions and topical association
Co-occurrence does not need a hyperlink. A brand mentioned in a news article, a forum thread, a podcast transcript or a conference write-up still appears in that context for anyone, or anything, reading the text. Search engines can recognise entities from text, and AI models learn from text whether or not it is linked.
That changes how you value mentions:
- Unlinked mentions in relevant context still help build topical association and brand recognition, even if they pass no link signal.
- Some are worth turning into links. If a page mentions you and would be more useful to its readers with a link, ask politely. Our guide to unlinked brand mentions covers the outreach.
- Sentiment and description matter. "Brand X, which suits small teams" helps; "Brand X, which had a major outage" builds a different association.
- Consistency matters. Use the same brand name, short description and category language across your site, profiles and press materials, so mentions reinforce each other.
Shaping the sentence around your name
You cannot control what others write, but you can make the right description easy to copy. Keep a one-sentence description of what you do, for whom, in your press kit, on your About page and in author bios. Writers under deadline often reuse it. If you are described differently in different places, choose one version and update the sources you control. Our guide to brand SERP management covers the search results for your own name.
Linking out also creates associations
Co-citation works through the pages you link to as well. Linking to authoritative, relevant sources from your content places your page in good company. Google's starter guide advises that you "make sure you trust the resource you're linking to". Our guide to outbound links covers when and how to link out.
Measuring contextual brand associations
There is no single metric for co-citation or co-occurrence, and no tool can see how Google weighs them. You can still track whether your associations are growing in the right direction.
| What to measure | How | How often |
|---|---|---|
| Share of category lists that include you | Your tracking sheet of "best of" and comparison pages for core queries | Quarterly |
| Brands most often mentioned beside yours | Brand-monitoring tool exports; count co-mentions in the same article | Quarterly |
| Context words around your brand | Export mention snippets and count recurring descriptive terms | Quarterly |
| AI answer inclusion | Run a fixed set of category prompts in major AI assistants and record whether you appear | Monthly |
| Branded and brand-plus-category search | Search Console queries like "[brand] payroll" or "[brand] vs [leader]" | Monthly |
| Referring domains from relevant sites | Backlink tool, filtered to topically relevant domains | Monthly |
A worked example
Hypothetical example. A project management tool for architecture firms tracks 25 core queries. In January it appears on 6 of the 61 independent list and comparison pages that rank for them (about 10%). Its brand is most often mentioned beside generic task apps, and AI assistants include it in 2 of 20 test prompts. After six months of outreach, original research on architecture project overruns and new comparison pages, it appears on 19 of 64 pages (about 30%). It is now most often co-mentioned with two architecture-specific competitors, and it appears in 8 of 20 prompts. Searches for the brand name plus "architects" have also grown. None of these numbers proves a ranking mechanism, but together they show the brand is now understood as part of the right category.
For the raw link side of reporting, our guide to referring domains vs backlinks explains why domain counts are more honest than link counts.
Questions SEOs ask about co-citation and co-occurrence
Is co-citation a Google ranking factor?
Google has not confirmed a co-citation signal. It has said that links and the words around them help it understand what pages are about, so contextual associations are a reasonable part of off-page strategy.
Do unlinked brand mentions help SEO?
They can help build recognition and topical association, and they influence what people and AI systems read about you. They do not pass link signals, so turning relevant ones into links can add value.
Is co-occurrence the same as LSI keywords?
No. Older SEO writing linked co-occurrence to latent semantic indexing, but modern search uses far more advanced language systems. The useful idea is simply that brands and topics described together become associated.
Can co-citation hurt a site?
Being consistently mentioned among spammy or irrelevant sites is not a helpful association, and links from link schemes can breach Google's spam policies. Focus on relevant, editorial contexts.
How do I find lists my competitors are on but I am not?
Search your category's core queries, note every independent list and comparison page, and record which brands each mentions. Pages naming two or more competitors but not you are your first outreach targets.
Mapping your category's co-citation gaps this quarter
Write down 15 to 25 core category queries and AI prompts, collect the independent pages and answers that appear for them, and record who is mentioned and how. Pick the ten pages that mention your competitors but not you, and build a fair case for inclusion. Then standardise your one-sentence brand description everywhere you control it.
If you want help building associations that last, our SEO services team runs off-page and digital PR campaigns built around relevance rather than link counts, and our online reputation management service helps when the context around your name needs work. Get a quote to start.
Further reading on co-citation
- Referring Domains vs Backlinks: Which Number Actually Matters?
- Deep Links: Why Links to Inner Pages Matter
- SaaS Link Building: Integration Partners, Review Sites and Data
Sources for this co-citation and co-occurrence guide
- SEO link best practices for Google - Google Search Central
- A guide to Google Search ranking systems - Google Search Central
- AI features and your website - Google Search Central
- SEO Starter Guide - Google Search Central
- Spam policies for Google web search - Google Search Central
- Link Building: What Are Co-citation and Co-occurrence? - Semrush Blog (2015)
