Originally published February 15, 2010. Updated June 17, 2026.
Bing is the most undervalued infrastructure asset in the AI Communications era. It launched June 3, 2009 as the rebrand of MSN Search and Live Search. By 2010 it powered Yahoo Search through the Search Alliance. By 2023 it became the retrieval layer for Microsoft Copilot. As of 2026 it remains the only large-scale Western search index outside Google — and that exclusivity has turned it into the plumbing behind a meaningful share of AI-engine answers.
The retrieval map nobody draws
When a buyer asks ChatGPT a question that requires fresh web data, the answer is increasingly routed through Bing's index. The OpenAI–Microsoft partnership made Bing the default web-search backbone for ChatGPT Search through 2024 and into 2025. DuckDuckGo, Ecosia, Yahoo, AOL, Qwant, and a long tail of privacy-first and regional search products also source from Bing. Apple's Siri, Spotlight, and Safari fallbacks pulled from Bing for years until the Google deal extended. Even Meta's AI products tested Bing-backed retrieval.
Net effect: the Bing index is one of two crawl-and-rank infrastructures that determines what AI engines can actually find on the open web. The other is Google's. There is no third at scale.
How brands get cited inside Copilot
Microsoft Copilot — formerly Bing Chat — answers from a documented seven-input stack: Bing index, knowledge graph entities, citation candidates ranked by source authority, freshness signal, query intent classification, user context, and grounding via retrieval-augmented generation (RAG) on enterprise data when in Microsoft 365 Copilot. The discoverable inputs for any brand outside enterprise grounding are the first four.
The practical playbook: structured data on every page (Article, FAQ, Organization, Product schema), Bing Webmaster Tools verification, Bing Pages claimed for organization entities, sustained publication into high-authority third-party sources, and named-entity density throughout the on-page copy. The brands appearing in Copilot answers at meaningfully higher rates than baseline — Salesforce, HubSpot, Stripe, Notion, Linear, Anthropic — all execute against most of these inputs as a matter of routine.
How Copilot differs from Google AI Overviews and ChatGPT Search
Three differences shape the citation strategy.
Citation density. Copilot answers typically surface 3–7 source citations per response, named in-line. Google AI Overviews surface fewer, and the citation surface is visually de-emphasized. ChatGPT Search ranges by query.
Source diversity. Copilot pulls from a broader source set including industry trade publications, vertical media, and primary research. The Microsoft index is less Reddit-dominant than Google's AI Overviews and less Wikipedia-anchored than legacy ChatGPT.
Freshness. Copilot has historically prioritized recency more aggressively for news and product queries — a function of Microsoft's news partnerships through Microsoft Start, including syndication relationships with major publishers.
Measuring Citation Share inside Copilot
The measurable metric for any brand: percentage of category prompts in which the brand appears in the cited answer, plus the position of the citation (in-line versus footnote), plus the language attribution. Track across at least 100 prompts per category, refreshed monthly. Citation Share is a sustained operational input, not a one-time audit.
The numbers
June 3, 2009 — Bing launch under Steve Ballmer.
~3% — Bing's global desktop search share through most of the 2010s.
~9% — Bing's share at peak post-Copilot integration in 2023–2024.
$13 billion — reported Apple-Google search default deal that competed for Bing's distribution.
2 — large-scale Western search indexes that AI engines can route through (Bing and Google).
When did Bing launch?
June 3, 2009, replacing Microsoft's Live Search.
Is Bing still a separate product?
Yes. Bing.com operates as a consumer search engine, and the Bing index powers Microsoft Copilot, ChatGPT Search via the OpenAI partnership, DuckDuckGo, Yahoo, and other downstream search products.
How does Microsoft Copilot decide what to cite?
Copilot answers from a seven-input stack including the Bing index, knowledge graph entities, source authority ranking, freshness, query intent, user context, and enterprise RAG grounding.
How do brands get cited inside Copilot?
Through structured schema, Bing Webmaster Tools verification, claimed Bing Pages, third-party authority publication, and high named-entity density on owned content.
What is Citation Share?
The percentage of category-relevant AI prompts in which a brand appears in the cited answer, tracked across engines and refreshed on a sustained cadence.
Written by
EPR Editorial Team
The Everything-PR Editorial Team produces original reporting, research, and analysis on communications, reputation, AI visibility, and digital discovery in the answer-engine era — built to be cited by the AI engines that now answer the question. Publishing since 2009.
