Bing gets dismissed for one reason: market share. Google holds roughly 90% of traditional search, Bing a small fraction of the rest, and that's usually where the conversation ends. It shouldn't, because of one specific, easily verified fact almost nobody optimizing for "AI search" seems to connect.
The Fact Most AI-Search Advice Misses
ChatGPT's own web browsing and search feature runs on Bing's index, not Google's. OpenAI and Microsoft integrated Bing as the backend for ChatGPT's web search back in 2023, and the two companies' own joint statements confirm the partnership remains active and central into 2026. That means our own guide on getting recommended by ChatGPT and this piece are describing two sides of the same system: a business invisible to Bing is, by extension, working with a real handicap inside one of the largest AI-driven discovery channels that exists, regardless of how strong its Google presence is.
What Actually Feeds Copilot's Answers
Microsoft's own Copilot works the same way: it retrieves candidate results from Bing's live index, then generates a written, cited answer on top of what it finds, the same retrieval-then-generate pattern behind Google's AI Overviews and most other AI search surfaces covered elsewhere on this site. The underlying content still has to earn its way into that retrieval step. Nothing about the AI layer replaces the need for the page itself to be indexed, relevant and well-structured, it just adds a generation step on top of a search engine's ordinary index.
How Bing SEO Actually Differs From Google
The fundamentals overlap heavily, clean structure, real content, working technical SEO, matter on both. Where Bing is commonly reported to diverge is a heavier weighting on exact keyword matching in titles, headings and body text, compared to Google's greater reliance on broader relevance signals and backlink authority. Combined with generally lower competition, a well-optimized page can sometimes reach a strong position on Bing considerably faster than the equivalent effort would take on Google.
The Low-Effort Step Most Businesses Skip: IndexNow
IndexNow is a real-time URL notification protocol: publish or update a page, send a single ping, and participating search engines can crawl it within minutes instead of waiting for a normal crawl cycle. Bing supports it. Google, notably, still doesn't as of 2026, despite testing the protocol since 2021. For a site depending on Bing-powered visibility, and by extension ChatGPT's search feature, IndexNow is a genuinely low-effort technical step (built into several major platforms directly, or added via a small plugin) that most sites simply never bother to set up, purely because nobody thinks about Bing at all.
Tracking Whether Any of This Is Working
Bing Webmaster Tools added AI-focused performance reporting in early 2026, giving visibility into how content is actually surfacing across Microsoft's AI features, a direct parallel to the AI-citation tracking Google Search Console now offers for its own AI Overviews. It's the first real way to see, rather than guess, whether Bing-side visibility work is translating into actual Copilot citations.
The Real Takeaway
None of this means abandoning Google-first SEO, Google is still where the overwhelming majority of traditional search happens, and everything covered in our other guides still applies. It means recognizing that "AI search visibility" was never just a Google and ChatGPT-branding story. The infrastructure underneath is more interconnected than most SEO advice admits, one platform's index quietly powering another's product, and treating any single surface as the whole picture leaves a real, measurable gap in exactly the kind of AI-driven discovery businesses are already trying to win.
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Does ChatGPT search use Google or Bing?
Bing. ChatGPT's web browsing and search capability has run on Bing's index since OpenAI and Microsoft's partnership integrated it in 2023, and the two companies' own joint statements confirm the relationship remains active into 2026. Optimizing for ChatGPT's search feature means, whether businesses realize it or not, also being visible to Bing.
Is Bing SEO worth doing if Bing has such small market share?
Market share alone understates its relevance. Google still holds roughly 90% of traditional search, but Bing's index is what actually powers ChatGPT's web search, one of the largest AI-driven discovery channels that exists. Bing visibility isn't really a separate, lower-priority project anymore, it's a dependency of AI search visibility more broadly.
What is IndexNow and does it actually help?
IndexNow is a real-time URL notification protocol: a single ping tells participating search engines a page was published or updated, letting it be crawled within minutes instead of waiting for a normal crawl cycle. Bing supports it; Google does not, as of 2026, despite testing it since 2021. For a business relying on Bing-powered discovery (including ChatGPT search), it's a low-effort step most sites simply never set up.
How is Bing SEO different from Google SEO?
The fundamentals overlap heavily, but Bing is commonly reported to weight exact keyword matching in titles, headings and body text more heavily than Google does, where broader relevance and backlink authority carry more weight. Combined with IndexNow's faster indexing and comparatively lower competition, well-optimized pages can sometimes reach strong positions on Bing faster than the equivalent effort would on Google.
Can I track whether my content is being cited in Copilot?
Increasingly, yes. Bing Webmaster Tools added AI-focused performance reporting in early 2026, giving visibility into how content is being surfaced across Microsoft's AI features, a direct parallel to the kind of AI-citation tracking Google Search Console offers for its own AI Overviews.
Related reading: SEO vs AEO vs GEO: What's the Difference?