What Is an Entity in SEO?

An entity is a specific, identifiable thing, such as a person, a business or a place, that a search engine or AI model can tell apart from everything else with a similar name. For a health practice, it means Google and AI tools need to be confident about which clinic you are before they will name you in an answer. Google described the idea in 2012 as "things, not strings," meaning it wanted to understand real-world things instead of only matching words.

How an entity works

Older search matched words. A patient typed a phrase, and the engine looked for pages that contained it. Modern search also tries to work out which real thing a name points to. Google's 2012 announcement of its Knowledge Graph used "Taj Mahal" as the example, since the name could mean the monument or the musician, and said the goal was to find the right one. You can read how Google stores these records in Knowledge Graph.

A health practice has the same problem on a small scale. A name like "Example Integrative Health" could belong to several clinics in different states. A system decides which one you are by collecting facts about the name and checking whether they agree.

These are the facts that identify a practice.

• Name. The exact practice name, spelled the same way each time.
• Address and phone. The physical location and the main number.
• Website. The one web address that represents the practice.
• People. Providers, their credentials and where they work.
• Specialty. What you treat and which services you offer.
• Official profiles. Your Google listing, state board pages, association directories and social profiles.

A practice is really several entities connected to each other. The clinic is one. Each provider is another. The link between them, this physician works at this clinic, is what lets a system answer a question such as who treats thyroid problems in Boulder. Google's 2012 post showed the same idea with Marie Curie, whose family and awards were linked to her record.

Providers deserve the same care as the practice. A physician who appears as "Dr. Jane Smith" on one page, "Jane A. Smith, MD" on another and by a nickname on a third can look like three people. Pick the form you want used, and link each provider's bio to credible profiles such as the state license lookup and the association directory, so a reader or a system can confirm the person is real. The same goes for the practice. If people say an abbreviation or the clinic went by an earlier name, either use one form throughout or state the variants once, plainly, on your About page, so the connection is written down and not left to guesswork.

Confidence comes from agreement. If your website, your Google listing, a state board page and a specialty association directory all give the same name and location, the match is easy. If they disagree, the system can split you into two weak records or pick a clearer competitor. Keeping those facts identical is the job of NAP consistency.

Nobody outside the AI companies can say exactly how ChatGPT or Perplexity resolve names, and the vendors have not published it. What is documented is narrower. Google's organization markup guide says the url field "helps Google uniquely identify your organization," and that the sameAs field points to other pages with more information about it. Google also says there are no additional requirements to appear in AI Overviews or AI Mode.

Mentions help too, with a caveat. Ahrefs studied 75,000 brands and found that branded web mentions correlated with AI visibility at about 0.66 to 0.71, on a scale where 1.0 is a perfect match. Ahrefs notes that correlation is not causation. It still fits the idea that a name appearing in many places in the same form is easier to recognize.

Example: an entity at a health practice

This example is illustrative, not a transcript. A functional medicine clinic in a mid-size city has one physician and two nurse practitioners. Its website uses one version of the name. Its Google listing adds the word Wellness. A state board page lists the physician at an address from two moves ago, and a specialty association directory carries a phone number the clinic retired.

A patient asks an AI tool for a functional medicine doctor who treats thyroid problems nearby. The tool looks for sources that agree about a clinic and its providers. It finds two versions of the clinic name, three addresses and two phone numbers. A competitor with one name and one address across every source is easier to name with confidence, so the competitor gets the mention. Nothing about the clinic's care changed. Only the clarity of its identity did, and in most cases a patient would not see that difference.

Real data shows which sources count. MGMA analyzed 33,340 ChatGPT citation events across 200 practices, 20 metros and 10 specialties in May 2026. Hospital staff rosters made up 27.5% of citations, practice-owned websites about 23%, specialty association credentialing pages 22.1%, national medical directories 8.3% and state medical board profiles 5.1%. Almost every one of those is a page that states who a provider is and where that provider works. They are the sources a system can use to confirm your identity, so an outdated line on any of them can pull a different answer than your own site gives.

Two cautions apply. The MGMA article was written by the founder of a commercial AI growth service, and the analysis covers one platform and is correlational. Use it as a map of where to look.

How to check yours in 60 seconds

1. Search your exact practice name plus your city on Google.
2. Look at the Maps result or information box. Read the name, address, phone and category.
3. Ask an AI tool, "What is [your practice name] in [your city] and what do they treat?"
4. Compare both answers to what you would say about your own practice.

Wrong details, a different practice or "I don't have information" all point to an identity problem. Write down every mismatch you see, including small ones like a missing suite number or an old provider name, because the fix list comes straight from that note.

What to do about it

1. Write one plain sentence that says who you are, what you treat and where. Use it everywhere.
2. Pick one exact practice name and use it on your site, your Google listing and every directory.
3. Build one entity home page that every other profile points back to.
4. Add schema markup to that page with your name, address, URL and links to your official profiles.
5. Claim and complete your Google Business Profile, then update the state board, association and directory pages that list your providers.
6. Recheck every quarter and after any move, hire, departure or phone change. Put the official facts in one shared document so a new front desk hire or marketing vendor starts from the right version.
7. Give each provider a bio page that states credentials, specialty and the clinic they belong to, and make sure the wording matches the state board and association listings. Those pages connect the people to the practice, which is the link systems look for.
8. Keep a short log of every change with the date, so you can trace where an old fact came from when one resurfaces.