Bing Copilot

Long definition

Bing Copilot was the first major-search AI integration to ship. On February 7, 2023, Microsoft and OpenAI announced "Bing Chat" — a GPT-4-class model wired to the Bing index for live web grounding. It beat Google's SGE preview to market by three months and forced the competitive response that became AI Overviews.

The product evolution:

• February 7, 2023 — Bing Chat launches in limited preview with GPT-4-class models.
• September 21, 2023 — Microsoft rebrands Bing Chat to "Copilot" and "Microsoft Copilot," consolidating brand across consumer and enterprise.
• 2024-2025 — Copilot expands across Edge sidebar, Windows 11 taskbar, Microsoft 365 apps, and a standalone Copilot app. Bing Copilot specifically refers to the Search-embedded surface.
• Models evolved from initial GPT-4 to a mix of GPT-4 Turbo, GPT-4o, and Microsoft's own Prometheus orchestration layer.

For SEO/GEO, Bing Copilot matters more than Bing's market share suggests. Bing's index is the grounding source for ChatGPT Search and several other AI products via the Bing Search API. Showing up in Bing's organic ranking is a prerequisite for visibility across the broader OpenAI/Microsoft answer-engine stack.

What drives citation:

• Bing organic ranking. The retrieval set is the top-N Bing results for the query.
• IndexNow adoption. Microsoft pushes IndexNow as the canonical fast-discovery protocol; sites that ping it get crawled and re-crawled faster.
• Schema.org structured data. Bing has historically been more aggressive about consuming Schema than Google, and Copilot retrievers use it to disambiguate entities.
• Site authority and topical depth, same as Google.

Bingbot is the relevant crawler. Block it and you remove yourself from the Bing index, which removes you from Copilot, ChatGPT Search (partially), and DuckDuckGo (which uses Bing as one of its retrieval backends).

Common misconceptions

• "Bing Copilot is the same as Microsoft Copilot in Office." Different surfaces. Bing Copilot is the Search-embedded answer engine. Microsoft 365 Copilot is the enterprise productivity assistant inside Word, Excel, Outlook, etc. They share the brand and some underlying models, not the product surface.
• "Bing's small market share makes it irrelevant for SEO." Bing's direct share is small but its index grounds OpenAI's web search, DuckDuckGo, and Yahoo. Optimizing for Bing is optimizing for a meaningful slice of the AI search ecosystem, not just Bing.com users.
• "Bing Chat still exists as a product." The name was retired September 21, 2023. References to "Bing Chat" in 2026 documents are stale — the live surface is Microsoft Copilot in Bing.