Where does Microsoft Copilot get its web answers?

When Copilot searches the web, it grounds its answer in Bing search results and cites the pages it used. A page that Bing has not crawled and indexed cannot be one of those sources.

An open protocol, launched by Microsoft Bing and Yandex in 2021, that lets a site tell participating search engines the moment a URL is added, updated or deleted. A submission to one participating engine is shared with the others.

Does Google support IndexNow?

No. Google does not take IndexNow submissions; it discovers changes through crawling and your sitemaps. IndexNow helps with Bing and the other participating engines, which is what Copilot draws on.

How do I set up IndexNow on WordPress?

Generate a key, serve it from your site so engines can verify it, and send the changed URLs whenever you publish. Many SEO and caching plugins do this for you. When Rank Prompt publishes to WordPress through its Connector plugin, the plugin serves the key and the post is announced to Bing, Yandex, Seznam and Naver as it goes live.

Copilot and Bing: Why IndexNow Matters for AI Citations

Microsoft Copilot is an AI assistant with a search engine behind it. When it looks something up, it answers from the Bing index and cites the pages it used. That makes a very old SEO problem suddenly urgent: if Bing has not indexed your page yet, Copilot cannot cite it, however good it is.

Quick answer

Copilot grounds its web answers in Bing, so getting new and updated pages into Bing’s index quickly decides whether Copilot can cite them. IndexNow is the fastest way to do that: an open protocol that notifies Bing and the other participating engines the moment a URL changes, instead of waiting for the next crawl. Set it up once, keep your pages crawlable for Bingbot, and write pages that answer questions directly.

Here is how the pieces fit, and a checklist to make your site easy for Copilot to use.

How Copilot finds the pages it cites

Copilot answers many questions from the model alone, but when a question needs current or specific information, it searches the web through Bing and builds the answer from the results, with links to its sources. The chain looks like this:

Bing crawls and indexes your page.
Copilot’s search retrieves it as a candidate for a question.
The model reads it and decides whether it is worth citing in the answer.

Step one is the one you control most directly, and it is also the one most sites neglect, because most SEO habits were built around Google’s crawler.

What IndexNow does

Search engines normally discover changes by recrawling: they come back to your site on their own schedule and notice what is new. For a fresh article or a corrected price, that can take a while.

IndexNow flips the direction. It is an open protocol, launched by Microsoft Bing and Yandex in 2021, that lets your site notify search engines the moment a URL is added, updated or deleted. The mechanics are simple:

You generate a key and serve it as a text file on your own domain, which proves you control the site.
Whenever a page changes, your site sends the URL to an IndexNow endpoint along with the key.
The participating engines, which include Bing, Yandex, Seznam and Naver, share submissions with each other, so one ping reaches all of them.

Google does not take IndexNow submissions; it keeps relying on crawling and sitemaps. For Copilot, though, Bing is the index that matters, and IndexNow is the most direct line into it.

Setting up IndexNow

There are three common routes, depending on your stack:

WordPress plugins. Many SEO and caching plugins can generate the key, serve it and ping on publish. Turn the option on and confirm the key file loads at the URL the plugin shows.
Your CDN or host. Some CDNs and hosting platforms offer IndexNow as a setting and ping automatically when content changes.
Your own code. For a custom site, generate a key, serve it from your root, and send changed URLs to the IndexNow endpoint in your publish or deploy step.

Bing Webmaster Tools is worth connecting either way. It shows whether your submissions are being received, which pages are indexed, and any crawl problems Bingbot ran into.

When Rank Prompt publishes an article to WordPress, the Rank Prompt Connector plugin serves an IndexNow key, and the post is announced to Bing, Yandex, Seznam and Naver as it goes live. The connection check also tells you when a site serves no IndexNow key, so you find out before you publish rather than after.

A checklist for being citable in Copilot

Let Bingbot in. Check your robots.txt and your firewall rules. Security tools and bot protection sometimes block crawlers that are not Google, and a blocked crawler means an empty index.
Turn on IndexNow, and submit changed URLs on every publish and update.
Submit a sitemap in Bing Webmaster Tools, so Bing has a complete list even when a ping is missed.
Answer the question in the first lines. Copilot, like other assistants, lifts clear, specific statements. A page that opens with the answer is easier to cite than one that opens with a story.
Keep facts consistent across the web. Prices, specs, opening hours and addresses that match everywhere are easier for any assistant to trust.
Mark up your pages with the schema that fits: Article, FAQ, Product, LocalBusiness.
Measure the result. Copilot referrals show up in GA4 with a copilot source, so you can see whether the visits follow.

Copilot in the bigger picture

Copilot is one assistant among several, and each one builds answers from different sources. Bing’s index feeds Copilot; Google’s feeds AI Overviews and AI Mode; ChatGPT, Perplexity, Claude, Gemini and Grok each have their own mix. The pages that win across all of them tend to share the same traits: indexed quickly, easy to crawl, and written to answer.

Rank Prompt tracks the same prompts every week on ChatGPT, Perplexity, Google AI Mode (AI Overviews), Claude, Gemini and Grok, records which pages each answer cites, and recognizes Copilot referrals among the AI assistants it separates in your GA4 traffic.