Google AI Overviews vs ChatGPT Search: What's the Difference?
- 4 hours ago
- 10 min read
Google AI Overviews and ChatGPT Search both use artificial intelligence to answer questions using information found online. However, they do not offer the same search experience or select and present information in exactly the same way.
Google AI Overviews appear within Google’s existing search results. They give users an AI-generated summary while still providing access to traditional organic results, adverts, maps, shopping listings and other Google features.
ChatGPT Search operates through a conversational interface. It can research a question, produce an answer and then respond to follow-up questions without requiring the user to begin a completely new search.
For businesses, this difference matters. A strategy that helps your website rank in Google can support both platforms, but traditional rankings alone do not guarantee that your business will appear in an AI-generated answer.
Understanding how the two systems work will help you build a broader and more effective AI SEO strategy.
What Are Google AI Overviews?
Google AI Overviews are summaries that can appear towards the top of a Google search results page.
They are designed to answer a question or introduce a subject without requiring the user to visit several separate websites. The answer may contain links to supporting sources, allowing the user to explore particular points in more detail.
An AI Overview does not appear for every search. Google decides when a generated response would add something useful to the normal results.
For example, a simple search for a company name may only produce the company’s website, business profile and other standard listings. A more detailed question, such as “What should I look for when choosing an AI SEO agency?”, may be more likely to produce a generated summary.
Google explains that its AI search features are connected to its existing search and quality systems. To be considered as a supporting link, a page generally needs to be indexed and eligible to appear within ordinary Google Search.
This means that familiar SEO work remains important. Your website still needs to be accessible, technically sound, useful and relevant.
However, Google may use a process known as “query fan-out” when preparing an AI response. This involves running several related searches across different parts of the original question. Google can then combine the information it finds into a wider answer.
A single user question may therefore represent several search opportunities rather than one conventional keyword.
You can find Google’s current explanation in its official guide to AI features and your website.
What Is ChatGPT Search?
ChatGPT Search allows ChatGPT to search the web when it needs current or source-backed information.
Instead of presenting a conventional page containing ten blue links, ChatGPT produces a written response. It may include citations within the answer and a collection of sources that the user can open.
ChatGPT may search automatically when a question would benefit from current information. A user can also ask it to search directly.
The most obvious difference is that the conversation can continue.
A user might begin by asking:
“Which accounting software is suitable for a growing UK manufacturer?”
They could then ask:
“Which of those options integrates with our existing stock system?”
The next question might be:
“Which providers offer UK-based support?”
ChatGPT can use the context of the previous conversation when responding. The user does not necessarily have to repeat every requirement with each search.
This makes ChatGPT particularly useful during research and comparison. People can gradually narrow their options as they move towards a decision.
OpenAI uses a web crawler called OAI-SearchBot to help surface websites within ChatGPT search features. Businesses can allow this crawler without allowing their content to be used for general AI model training.
Allowing the crawler does not guarantee that a website will be cited or recommended. It simply makes the site eligible to appear when ChatGPT searches the web.
OpenAI provides further technical information in its overview of OpenAI crawlers.
Google AI Overviews vs ChatGPT Search at a Glance
Area | Google AI Overviews | ChatGPT Search |
Where it appears | Within Google Search | Within a ChatGPT conversation |
Main format | Summary alongside other search features | Conversational answer with sources |
How searches begin | Through a Google search query | Through a question or ongoing conversation |
Follow-up questions | Usually begin another Google search | Can build upon previous questions |
Traditional results | Remain visible on the search page | Not presented as a conventional results page |
Source discovery | Closely connected to Google’s search index and ranking systems | Uses web search and sources available to OpenAI’s search systems |
Local results | Can be supported by Google Maps and Business Profiles | May use web results, listings and other relevant sources |
Measurement | Search Console and third-party AI visibility tools | Referral data and third-party AI visibility tracking |
Paid visibility | Adverts may appear elsewhere on the Google results page | Organic citations cannot simply be purchased |
User journey | Search, scan, click or refine | Ask, review and continue the conversation |
The services share several foundations, but their interfaces affect how people research and make decisions.
The User Journey Is Different
Google users are familiar with scanning a search results page.
Even when an AI Overview appears, they may also see adverts, product listings, maps, videos, images and standard organic results. They can compare different types of information without leaving Google.
ChatGPT provides a more controlled journey. It may summarise several sources and give the user a direct answer before they visit any website.
This can reduce the number of businesses a potential customer considers.
For example, Google might display an AI Overview followed by several agency websites and directory listings. ChatGPT might mention three suitable agencies within a written shortlist. A business excluded from that answer could receive no visibility at all unless the user asks for more options.
This does not mean that one platform is automatically better than the other. It means that businesses need to understand how customers use each platform.
Google remains important for broad search visibility. ChatGPT may become particularly influential when someone wants help comparing options or making sense of a complicated decision.
They May Interpret the Same Question Differently
Google AI Overviews and ChatGPT Search do not necessarily return the same answer for the same question.
Their answers may differ because they can:
Discover different sources
Interpret the user’s intention differently
Apply different quality and relevance systems
Use location or context differently
Refresh their information at different times
Present different types of supporting evidence
Even results produced by the same platform can change. AI answers are generated dynamically and the sources used for one response may not appear in the next.
This is why a single screenshot should not be treated as complete evidence of AI visibility.
If your business appears once for a valuable question, that is encouraging. However, you need to monitor a wider collection of relevant prompts over time to understand whether the visibility is consistent.
Our guide to measuring visibility in AI search explains the metrics worth tracking.
Do Google and ChatGPT Use the Same Ranking Factors?
Neither Google nor OpenAI publishes a simple checklist that guarantees inclusion within an answer.
Google says that its AI search features remain grounded in its existing search systems. Conventional signals relating to relevance, quality, usability and authority can therefore influence whether a page is discovered and used.
ChatGPT Search also needs to find relevant, accessible and trustworthy information. However, it does not simply copy Google’s traditional rankings.
A website could perform well in ordinary Google results but fail to appear in a ChatGPT answer.
ChatGPT may instead reference a review platform, industry publication, directory, news article or another source that discusses the business.
The areas of overlap include:
Technically accessible web pages
Clear and relevant information
Original, useful content
Demonstrable experience
Consistent brand information
Trusted external references
Accurate and current details
A strong online reputation
These foundations help both search engines and AI platforms understand whether a business is relevant and credible.
Can the Same Business Appear in Both?
Yes. A business can appear in a Google AI Overview and a ChatGPT Search answer for the same subject.
In fact, improving the underlying quality and authority of your online presence can increase your opportunities across both.
A strong service page may explain what you offer. A detailed guide may demonstrate expertise. Customer reviews can provide independent evidence. Industry coverage and relevant links can support your authority.
Together, these sources create a clearer picture of your business.
The important point is that AI systems do not have to rely entirely on your own website. They may use third-party information to confirm, challenge or expand upon what you say about yourself.
A business cannot establish its expertise by repeatedly declaring that it is an expert. Independent evidence is much more persuasive.
This is one reason why digital PR, reviews, case studies and credible industry references form an important part of AI SEO.
How to Optimise for Google AI Overviews
There is no separate switch that will place your website in Google AI Overviews. Google also states that no special AI schema is required.
The sensible approach begins with effective SEO.
Make Sure Google Can Access Your Content
Your important pages need to be crawlable, indexable and eligible to appear within Google Search.
Technical problems can prevent Google from properly assessing valuable content. Check for accidental blocking, incorrect canonical tags, weak internal linking and pages that depend too heavily on scripts.
A detailed technical SEO review can help identify these barriers.
Answer the Wider Question
Do not focus exclusively on repeating a target keyword.
Consider the questions surrounding it. Someone researching an AI SEO agency may also want to know how the service works, how results are measured, how much it costs and how long improvements normally take.
Covering these related needs gives Google more useful material when it explores the different parts of a question.
Add Original Value
A summary of information already published on dozens of websites gives Google little reason to reference your page.
Original research, first-hand experience, examples, comparisons and expert analysis can make a page more valuable.
Keep Important Information Clear
Make it easy to identify the subject of each page. Use logical headings, direct language and meaningful internal links.
You do not need to divide every sentence into an artificial block for an AI system. The page should primarily be easy for a person to understand.
How to Optimise for ChatGPT Search
Many of the same principles apply to ChatGPT, but there are several additional points to consider.
Allow OAI-SearchBot
Check that your robots.txt file does not accidentally block OAI-SearchBot if you want your pages to be eligible for ChatGPT Search.
This can be configured separately from GPTBot, which is used for potential AI model training.
Explain Your Business Clearly
Your website should make it obvious:
Who you are
What you offer
Which customers you help
Where you operate
What experience you have
Why your claims should be trusted
How someone can contact you
Vague marketing language makes a business harder to assess.
Build Evidence Beyond Your Website
ChatGPT may discover your business through sources other than your own domain.
Relevant coverage, industry directories, interviews, reviews, partnerships and professional profiles can all strengthen the information available about your brand.
The objective is not to create hundreds of low-quality mentions. It is to earn credible references in places that customers and search systems have good reason to trust.
You can learn more in our guide to how ChatGPT chooses which businesses to recommend.
Keep Information Current
Outdated services, old team details and inconsistent contact information create uncertainty.
Review important pages and external profiles regularly. If your business has expanded into new markets or stopped offering a particular service, make sure that change is reflected clearly online.
How Can You Measure Performance?
Measurement is another area where the platforms differ.
Google introduced dedicated generative AI performance reporting within Search Console in 2026. This can help website owners understand their visibility in features including AI Overviews and AI Mode.
Traditional Search Console data, organic traffic and conversions remain important too. An appearance within an AI feature only has commercial value if it helps generate useful visits, enquiries or sales.
ChatGPT measurement is less centralised.
You can look for referral visits from ChatGPT within your analytics platform, but traffic only tells part of the story. A user may see your company mentioned without clicking through immediately.
Third-party AI visibility tools can help track:
Brand mentions
Cited pages
Citation frequency
Competitor appearances
Platform coverage
Changes across selected prompts
The sources used to support answers
Running an AI SEO audit can establish a baseline before you begin making changes.
Should You Prioritise Google or ChatGPT?
For most businesses, Google should remain an important priority because it is already central to how people find products and services online.
However, that does not mean ChatGPT should be ignored.
ChatGPT may play a valuable role earlier in the purchasing journey, particularly when a customer is researching a complicated service, comparing providers or asking for a shortlist.
The right priority will depend on:
How your customers search
The length of your buying cycle
The complexity of your service
The countries in which you operate
The platforms your audience already uses
The questions people ask before contacting you
A local restaurant, an international software provider and a specialist manufacturer will not have identical search journeys.
Rather than choosing one platform, build a strong search presence that can support both.
Avoid Creating Separate Content for Every AI Platform
It may be tempting to create one version of a page for Google, another for ChatGPT and more versions for Gemini, Copilot and Perplexity.
This will often create duplication without adding value.
A better approach is to produce the strongest possible resource for the customer. It should be technically accessible, clearly written, well supported and connected to credible evidence.
That page can then be discovered by multiple search and AI platforms.
You may need to adjust technical crawler controls or monitor different prompts, but the core information should not change according to which machine reads it.
Useful information remains useful information.
Google AI Overviews and ChatGPT Search Share the Same Foundations
Google AI Overviews and ChatGPT Search provide different experiences, but both need information they can find, understand and trust.
Google AI Overviews sit within a wider results page and draw heavily upon Google’s established search systems. ChatGPT Search provides a conversational answer that can develop as the user asks more detailed questions.
Your business does not need two completely separate strategies.
It needs:
Strong technical SEO
Clear and useful content
Demonstrable expertise
Consistent brand information
Credible third-party references
Accurate and current details
Ongoing visibility monitoring
These foundations improve your opportunity to appear across traditional search, Google’s AI features and conversational search platforms.
The platforms will continue to evolve. The businesses best prepared for that change will be those building genuinely useful online resources and a credible reputation beyond their own websites.
Improve Marketing helps businesses across the UK and internationally understand how they appear within AI-generated search results. Our AI SEO services combine technical optimisation, content development, digital PR, authority building and ongoing visibility tracking.
If you want to know where your business is currently mentioned, which competitors are appearing and which sources AI platforms use, request an AI visibility audit.
