Google visibility has a more direct documented relationship with Gemini because Gemini can ground its answers with Google Search. Bing visibility matters for ChatGPT, but ChatGPT should not be treated as a Bing powered answer layer because OpenAI uses its own search crawler, ranking process, query rewriting, and multiple third party search providers.
If resources are limited, strong Google visibility remains a major AEO foundation. For ChatGPT specifically, add Bing visibility and OAI SearchBot accessibility rather than replacing Google SEO with Bing SEO.
Why is Google especially relevant to Gemini?
Google directly connects Gemini models with Google Search through its grounding system.
When search grounding is used, Gemini can generate one or multiple search queries, execute them through Google Search, process the results, and create a response supported by sources.
Google describes the process in its Grounding with Google Search documentation.
This creates a direct relationship between Google's searchable web ecosystem and Gemini's ability to discover current external information.
For marketers, that makes Google visibility a logical foundation for improving the pool of information Gemini can potentially retrieve.
Does ranking highly on Google guarantee a Gemini citation?
No.
A Google ranking and a Gemini citation represent different stages.
Gemini first needs to interpret the user's question. It can then create one or several searches that may differ from the original prompt. From the retrieved information, the model determines which evidence is useful for the final response.
A page could rank well for one keyword while remaining irrelevant to the searches Gemini actually generates.
AEO therefore needs to consider both ranking and question coverage.
Content should clearly answer the related questions an AI system may investigate, including:
- Product capabilities
- Pricing
- Alternatives
- Suitability
- Risks
- Customer type
- Location
- Use cases
- Implementation
- Comparisons
This is where query fan out becomes relevant to content strategy.
How important is Bing for ChatGPT?
Bing is an important part of the ChatGPT search ecosystem, but it is not the whole system.
OpenAI currently identifies Bing among the third party providers that can receive rewritten ChatGPT search queries. ChatGPT may generate multiple searches and can send additional queries after reviewing initial results.
OpenAI explains this in its ChatGPT Search documentation.
This means ranking in Bing can increase the chance that your content enters one retrieval path available to ChatGPT.
It does not guarantee that Bing's ordering will determine ChatGPT's final citations.
Why does OAI SearchBot matter separately?
OpenAI operates its own search crawler called OAI SearchBot.
OpenAI says OAI SearchBot is used to surface websites in ChatGPT's search features. Sites that opt out of the crawler will not appear in ChatGPT search answers, although they may still appear as navigational links in some circumstances.
OpenAI recommends allowing OAI SearchBot in robots.txt and allowing traffic from its published IP ranges.
You can review the current crawler details in OpenAI's crawler documentation.
That creates a technical requirement that traditional Bing ranking reports do not measure.
A website can perform SEO work successfully and still create an AI visibility problem if relevant AI search crawlers cannot access it.
Which should marketers prioritize first: Google or Bing?
For most businesses, Google should remain the primary traditional search foundation because the work required for strong Google visibility also improves many underlying qualities that other retrieval systems need.
Those qualities include:
- Crawlable pages
- Clear site architecture
- Useful content
- Strong topical relevance
- Accurate entity information
- Credible backlinks and mentions
- Good user experience
- Current information
Then expand the measurement layer.
Check Bing visibility for commercially important topics. Confirm OAI SearchBot accessibility. Monitor Gemini and ChatGPT independently.
AEO should extend the search strategy rather than force the company to choose one search engine and ignore the rest.
What should a cross platform AEO strategy optimize?
Think in terms of discovery coverage.
Your company should be easy to find through several possible routes:
- Google Search
- Bing
- AI specific search crawlers
- Independent publications
- Industry directories
- Review platforms
- Communities
- Partner sites
- Your own website
Then make the information those systems discover clear enough to use.
A page that says "we deliver transformative solutions" gives an AI system little concrete information.
A page that clearly identifies who the service is for, what problem it solves, where it is available, how the process works, and what evidence supports it gives retrieval systems much more useful material.
This is where SEO, AEO, digital PR, positioning, and content strategy begin to overlap.
How should you test Gemini and ChatGPT visibility?
Start with queries tied to buying behavior.
Instead of testing only your company name, test questions such as:
- Best provider for a specific customer problem
- Companies similar to a major competitor
- Best service for a particular industry
- Alternatives to an established vendor
- Provider recommendations in a location
- Product comparisons
- Cost questions
- Questions about suitability or risk
Run the same set through Gemini and ChatGPT.
For each prompt, record:
- Whether search was used
- Your brand's position in the answer
- Competitors mentioned
- Sources cited
- Your corresponding Google ranking
- Your corresponding Bing ranking
- Whether your own site was cited
- Which third party pages influenced the answer
The comparison can reveal whether your problem is traditional discovery, AI crawler accessibility, source authority, or final recommendation selection.
Our AI visibility advisory focuses on diagnosing those different stages before recommending more content.