AI search is changing how patients find dental practices online, and the jargon can be bewildering. This glossary cuts through the terminology so you can make informed decisions about your practice's digital visibility.
If you have sat in a marketing meeting, read a blog post, or spoken to a web agency recently and come away more confused than when you started, you are not alone. The language around AI search has exploded in the past eighteen months, and much of it is written for technologists rather than practice owners running a busy NHS or private clinic. Terms like "generative engine optimisation," "AI Overviews," and "entity salience" get thrown around as though everyone already knows what they mean. They do not. This glossary exists to fix that. It covers the key phrases you are likely to encounter when researching how AI search tools might affect your practice's online visibility, written in plain English and focused entirely on what is relevant for dental practices.
Understanding the language is not an academic exercise. When you can follow a conversation about AI search, you are better placed to ask the right questions of any agency you work with, spot where your current approach may have gaps, and prioritise budget sensibly. If you would like a broader introduction to the topic before working through these definitions, the article What is GEO? A plain-English guide for dental practice owners is a good starting point.
GEO stands for Generative Engine Optimisation. It refers to the practice of structuring and presenting your online content so that AI-powered search tools are more likely to surface your practice in their responses. Traditional SEO focuses on ranking in a list of blue links. GEO focuses on being mentioned, described, or recommended by AI systems that generate a written answer rather than a list of results. Our GEO service for dental practices covers the practical steps involved.
AI Overviews is Google's name for the generated summaries that sometimes appear at the very top of a search results page, above all other listings. When someone searches "best dental implants in Sheffield" or "how much does Invisalign cost," Google may generate a short written answer using information it has gathered from across the web. Appearing within that summary can be valuable, though it is not guaranteed by any single action or tactic.
A large language model is the underlying technology that powers AI tools such as ChatGPT, Google Gemini, Microsoft Copilot, and Perplexity. These models are trained on enormous amounts of text and learn to generate human-like responses to questions. When a patient asks ChatGPT "which dentist in York is good for nervous patients?", the answer comes from an LLM drawing on whatever information it has been trained on or can access in real time.
Generative AI is the broader category of artificial intelligence that creates new content, whether that is written text, images, or audio, rather than simply retrieving existing content. ChatGPT, Gemini, Copilot, and Perplexity are all generative AI tools. Their growing use as search tools is why practices need to think about how they are represented online beyond Google rankings alone.
Retrieval-Augmented Generation is a technical process used by many AI tools to improve the accuracy of their responses. Rather than relying entirely on what the model was trained on, the system retrieves relevant, up-to-date information from the web and then uses that to generate its answer. This is why having current, accurate, and well-structured content on your website and across your online profiles can help AI tools represent your practice correctly.
In AI and search terms, an "entity" is a clearly defined real-world thing: a person, a business, a location, a service, or a concept. Your dental practice is an entity. So is each of the treatments you offer. AI systems work by understanding relationships between entities rather than just matching keywords. If your practice is consistently described in the same way across your website, Google Business Profile, directory listings, and any press coverage, the AI is more likely to recognise you as a distinct and trustworthy entity.
Entity salience refers to how prominently and clearly a particular entity features within a piece of content. If a webpage mentions dental implants once in passing, implants have low salience on that page. If the entire page is structured around explaining dental implants, covering costs, candidacy, aftercare, and frequently asked questions, implants have high salience. Content with high entity salience around your core services is generally more useful to AI systems trying to understand what your practice offers.
Structured data is code added to a webpage that helps search engines and AI systems understand its content in a standardised way. Schema markup is the most common format used. For a dental practice, this might tell a search engine explicitly that a page is about a dental clinic, where it is located, what its opening hours are, and which treatments it provides. This kind of technical detail can make it easier for AI tools to incorporate accurate information about your practice into their responses.
A knowledge graph is a structured database of facts and relationships that search engines like Google use to understand the world. When Google "knows" that your practice is located in a particular town, offers specific treatments, and has been established for a certain number of years, that information is held in its knowledge graph. Practices with a well-established, consistent online presence are more likely to have accurate entries in this graph, which in turn can influence how they appear in AI-generated answers.
When an AI tool generates a response and includes a link or reference to an external source, that reference is called a citation. Being cited by ChatGPT, Perplexity, or Google's AI Overviews is similar in principle to being linked to by a respected website. It indicates that the AI system has drawn on your content as a source. There is no guaranteed method for earning citations, but producing clear, accurate, and well-organised content that directly answers the questions your potential patients are asking is a reasonable approach.
A zero-click search is one where the user gets the answer they needed directly from the search results page, without clicking through to any website. AI Overviews frequently produce zero-click results. This is one reason why some practices are seeing website traffic figures change even when their rankings have not obviously moved. The question of how AI search affects patient behaviour is covered in more depth in the article Will AI search replace Google for finding a dentist?
A prompt is the question or instruction a user types into an AI tool. "Find me a family dentist in Leeds accepting new NHS patients" is a prompt. The way AI tools respond to prompts is shaped by everything they know about the entities involved, including dental practices. Understanding how patients might phrase prompts when searching for dental care is increasingly useful when thinking about what content your website should contain.
Local AI search refers to queries where the user's location is relevant to the answer, such as finding a nearby dental practice. AI tools handle local queries in different ways, and the signals they use likely overlap with those used by traditional local SEO, including Google Business Profile information, reviews, NAP consistency (name, address, phone number), and localised content. If you are interested in how this plays out for specific locations, the articles AI search for dentists in Leeds: getting recommended locally and AI search for dentists in Huddersfield: getting recommended locally offer practical examples.
NAP stands for Name, Address, Phone number. Consistency means that these three details appear in exactly the same format wherever your practice is listed online, whether that is your own website, Google Business Profile, Dental Directory, NHS choices, or any other listing. Inconsistent NAP data can confuse both traditional search engines and AI tools trying to verify that your practice is a legitimate and accurately described entity.
Content authority refers to how credible and trustworthy your website's content appears to both human readers and AI systems. In a regulated profession like dentistry, authority is built through accurate information, clear identification of GDC-registered clinicians, transparent pricing where possible, and content that genuinely helps patients understand their options. AI tools are increasingly designed to favour content that demonstrates expertise and trustworthiness, which aligns well with the expectations of the GDC and ASA in terms of responsible patient communication.
These are the main AI tools that patients may now use when researching dental care. Perplexity is a search-focused AI that retrieves and cites web sources. Microsoft Copilot is integrated into Windows and Bing. Google Gemini powers AI Overviews and the Gemini app. ChatGPT is OpenAI's conversational AI, now used by a large and growing number of people for research tasks. Each uses slightly different methods to retrieve and present information, which is why a broad approach to online presence, rather than optimising for a single platform, is the most sensible strategy.
Understanding these terms is the first step. The next is knowing whether your practice is currently set up in a way that gives AI tools accurate, well-organised information to work with. Many practices are not, not through any fault of their own, but because the landscape has changed quickly and the requirements are different from traditional SEO alone.
A good starting point is a structured review of your current online presence: your website content, technical setup, Google Business Profile, directory listings, and how consistently your practice is described across all of them. If you are uncertain where to stand, a free SEO and visibility audit can give you a clearer picture without any obligation.
If you would like to talk through what GEO means specifically for your practice, and what a realistic approach might look like given your current patient mix and growth goals, the team at Dental Marketing Pros is happy to have that conversation. You can get in touch via our contact page and we will take it from there, no jargon, no pressure.
Running a practice in or around Sheffield? Our page on GEO and AI search for Sheffield practices shows how we apply this locally. We also work across South Yorkshire and North Derbyshire.
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