What Is Copilot Search in Bing, and Where Do Its Answers Come From?

Copilot Search and the Bing index: how an answer is built

Copilot Search builds an answer from Bing’s web results. It retrieves pages for the query, picks out the most useful points, and writes them up as a summary, a clear answer or a smart layout, depending on the question. Then it attaches the sources, so each claim can be checked.

Microsoft’s launch post of 4 April 2025 calls Bing an “AI-powered search and answer engine”. It promised “clearly cited sources” alongside data, images and video.

The answer also suggests related topics. Clicking one runs a fresh summary and offers more follow-up searches, while the earlier result stays on the same page.

You reach it from the Bing navigation bar, from suggested topics under some answers, or on mobile through the Bing app.

Microsoft has also written about grounding, the step where an answer is tied to web evidence.

In its June 2026 post it defined grounding as the source material the system uses to support and cite a response.

Copilot Search vs Bing search vs the Copilot app vs Microsoft 365 Copilot

Copilot Search is one of four Microsoft products with similar names, and only two of them draw on the public web index in a way site owners can influence. Mixing them up leads to wrong advice, such as optimising for Microsoft 365 Copilot, which mostly reads a company’s own files.

Bing’s AI Performance report covers Microsoft Copilot, AI summaries in Bing and “select partner integrations”. That is the set a site owner can measure.

The fourth column is our reading, not a Microsoft table. It reflects where public web pages enter each product.

Copilot Search citations: how sources are shown

Copilot Search citations appear in three places. There are citations within the written answer, entire sentences or passages linked straight to their source, and a list of cited sources and relevant web results at both the top and the bottom of the page. One click opens every link used.

Microsoft says it designed this with publishers in mind. The launch post says Copilot Search “cites its sources prominently”.

Sentence-level links are the useful detail. A specific, quotable sentence on your page can become a linked sentence in the answer.

That favours pages where each paragraph makes one clear claim. Long, padded paragraphs give the system less to link.

Digital Magma rewrites key paragraphs with this in mind.

The claim goes first, the number or name follows, and the source sits in the same sentence, so a linked sentence still makes sense on its own.

Copilot Search for a business: why it matters

Copilot Search matters most for B2B companies, because their buyers often work on Windows machines with Edge and Bing as the defaults. If Copilot cites a rival’s spec sheet in answer to a procurement question, that rival starts the conversation. Bing visibility is easy to overlook and fairly cheap to fix.

Edge users meet these answers without choosing them, which is why Digital Magma treats Bing as a channel for enterprise buyers rather than an afterthought.

The data is also better than elsewhere. Bing gives site owners a first-party citation report, which Google and OpenAI do not offer in the same form.

Digital Magma sets up Bing Webmaster Tools for every client for that reason. The citation data can help explain AI referrals that GA4 cannot attribute.

Copilot Search sources: Bing Webmaster Tools, IndexNow and crawl access

Copilot Search sources come from pages Bing can crawl, index and trust. Becoming one takes three practical steps: verify your site in Bing Webmaster Tools, let Bingbot in, and notify Bing of changes through IndexNow. Digital Magma checks all three before any content work begins.

1. Verify in Bing Webmaster Tools. Submit a sitemap and fix crawl errors. You can import a verified Google Search Console property.
2. Allow Bingbot. Microsoft says Bing respects robots.txt and other owner controls, so a blocked Bingbot means no index entry to cite.
3. Turn on IndexNow. It pings participating engines when a URL is added, updated or deleted.
4. Register in Bing Places. Microsoft suggests it for local businesses, so address and hours stay current in AI answers.
5. Write clear, structured pages. Microsoft names headings, tables and FAQ sections as helpful for accurate referencing.

IndexNow lists support from Microsoft Bing, Naver, Seznam.cz, Yandex and Yep. Without it, the project says, engines can take days to weeks to notice a change.

Microsoft links IndexNow directly to AI answers. It says faster discovery helps AI systems cite the current version of a page.

Copilot citations in AI Performance: how to measure them

Copilot citations are counted in the AI Performance report in Bing Webmaster Tools, launched in public preview on 10 February 2026. It shows how often your pages appear as sources across Microsoft Copilot, Bing AI summaries and some partner experiences. Four metrics carry most of the value.

Microsoft’s announcement says the counts do not indicate ranking or placement inside an answer.

On 16 June 2026, Bing added Intents, Topics, Citation Share and Compare. Citation Share is your part of all citations for one grounding query.

Copilot Search in our client work

Copilot Search work at Digital Magma begins in Bing Webmaster Tools, not in the content. For a client like our app development company with buyers in six countries, the first check is whether every market page is indexed in Bing at all. Content changes only make sense after that.

Grounding queries then guide the writing. They show the phrases Microsoft’s AI used to find a page, which often differ from the keywords in Google Search Console.

For a Canadian welding equipment manufacturer visible in ChatGPT and AI Overviews, Bing coverage is part of the same picture. OpenAI names Microsoft among ChatGPT’s search partners.

Copilot Search: frequently asked questions

Copilot Search questions we hear from B2B marketing teams.

Copilot Search: related terms, sources and author

Copilot Search connects to these entries in the Digital Magma knowledge base:

• AI citation: what a citation counts for
• Grounding: the idea behind grounding queries
• ChatGPT search: OpenAI’s product, which uses search partners
• AI crawler: the bots that fetch pages for AI products
• How to measure AI visibility: reporting across engines

Sources: Microsoft’s Bing blog posts of 4 April 2025, 10 February 2026 and 16 June 2026, and the IndexNow project site. All were checked on 22 October 2026.