What Is Entity SEO? How Google and AI Understand Your Brand

What is entity SEO?

Entity SEO is the practice of making sure search engines and AI tools understand exactly who your business is, as a distinct, well-defined “thing”, rather than just matching the words on your pages. It means defining the facts about your business clearly, marking them up in a way machines can read, and making sure the rest of the web confirms them.

Google signalled this shift when it launched its Knowledge Graph in 2012, describing the change as moving from “strings” (words) to “things” (entities). With AI search, it now matters more than ever. AI tools can only recommend a business they recognise and can describe with confidence.

What is an entity?

An entity is any distinct thing that can be clearly identified: a person, place, organisation, product or concept. Each one has attributes (facts about it) and relationships (how it connects to other entities).

For a business, those facts might include:

• its official name and any other names it’s known by
• what it does and which services it offers
• where it’s based and which areas it serves
• the people behind it
• its website and official profiles on other platforms

Keyword SEO asks, “Does this page contain the words people search for?” Entity SEO asks, “Does Google, or ChatGPT, know what this business is and trust the facts about it?”

What is the Knowledge Graph?

The Knowledge Graph is Google’s database of entities and the facts that connect them, and it’s larger than most people realise. Google’s own published figure is more than 500 billion facts about five billion entities, drawn from “hundreds of sources” across the web, including Wikipedia and open databases.

Independent tracking suggests it’s now far larger. Figures cited by Ahrefs in May 2026, from entity specialist Kalicube, put it at around 1.6 trillion facts about 54 billion entities. The same source reports that in June 2025 Google removed more than three billion entities in a single week, a clear-out widely read as a move to a cleaner dataset for its AI features.

The lesson for businesses: being in the Knowledge Graph isn’t permanent. Entities with thin, inconsistent or poorly corroborated information are the ones most likely to be dropped.

Why entities matter for AI search

Google has confirmed that its AI search draws directly on the Knowledge Graph. When it launched AI Mode, Google said it taps “fresh, real-time sources like the Knowledge Graph, info about the real world, and shopping data”.

The data also shows how much a brand’s wider web presence matters. In a study of 75,000 brands, Ahrefs found:

• how often a brand is mentioned across the web had the strongest link to appearing in Google’s AI Overviews, with a correlation of 0.664, three times that of backlinks (0.218)
• brands in the top quarter for web mentions averaged 169 AI Overview mentions, compared with just 14 for brands in the next quarter down
• 26% of brands didn’t appear in AI Overviews at all

Every consistent, trustworthy mention of your business adds to the picture AI systems build of your entity. Contradictory or missing information makes it harder for them to describe or recommend you.

How to strengthen your brand entity

Strengthening an entity comes down to six steps:

1. Agree your core facts. Write one short description of your business, and use the same name, description and service area everywhere.
2. Build a clear About page. State who you are, what you do, who you serve and how people can verify it.
3. Add Organization structured data. Mark up your business on every page, with a single identifier (@id) and a sameAs list linking to your official profiles.
4. Align your profiles. Make LinkedIn, Google Business Profile, Companies House, industry directories and review sites match your core facts exactly.
5. Earn mentions on trusted sites. Coverage, reviews and listings all corroborate your entity. Pew Research Center found Wikipedia, YouTube and Reddit alone made up 15% of the sources cited in Google’s AI summaries.
6. Connect your brand to your topics. Publish in-depth content on the subjects you want to be known for, and link it together, so search engines associate your entity with that expertise.

Here’s a simplified version of the Organization markup on our own site. Every page points back to the same @id, so search engines read the whole site as one connected entity:

{
  "@context": "https://schema.org",
  "@type": ["Organization", "ProfessionalService"],
  "@id": "https://theaiseoagency.co.uk/#organization",
  "name": "The AI SEO Agency",
  "url": "https://theaiseoagency.co.uk/",
  "description": "A UK agency that helps businesses get found, cited and recommended in AI search.",
  "areaServed": { "@type": "Country", "name": "United Kingdom" },
  "knowsAbout": ["AI SEO", "Generative engine optimisation", "Entity SEO"],
  "sameAs": ["https://www.linkedin.com/company/..."]
}

Structured data doesn’t guarantee a knowledge panel, but it removes guesswork about who you are.

How to check your entity strength

You can get a good sense of how well search engines and AI understand your business in about 15 minutes:

• Search your brand name on Google. Does a knowledge panel appear, and are the details correct?
• Ask AI tools directly. Ask ChatGPT, Perplexity and Gemini “What is [your business]?” and “Who are the best [your service] providers in [your area]?” Note what’s missing or wrong.
• Search Wikidata for your business name. Wikidata is one of the open databases search engines and AI systems use to confirm facts about entities.
• Audit your profiles. Compare your name, description, address and services across your site and every profile. Inconsistencies are the most common and easiest problem to fix.

If your checks turn up gaps, our entity SEO service defines your entity, implements connected schema and aligns your profiles. It also forms part of every AI visibility audit. For the bigger picture, read what AI SEO is and how GEO and AEO fit together.