# What content format does Microsoft Copilot Shopping actually prefer when deciding which product to surface, compared to what works for ChatGPT?

Reviewed by Martin Dejnicki, Director of SEO & AI Search · facts verified October 9, 2026 · canonical: https://deploi.ca/shopify/faq/copilot-shopping-vs-chatgpt-content-format

## Short answer

Microsoft Copilot Shopping prefers no page format of its own. Microsoft says it surfaces products from "both information found on the web and from a merchant's feed" ([Microsoft Advertising](https://about.ads.microsoft.com/en/solutions/technology/agentic-commerce), October 2026). For a Shopify store, products reach Copilot through Shopify Catalog, the same record ChatGPT reads ([Shopify's Copilot](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/microsoft) and [ChatGPT pages](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/chatgpt), October 2026). One complete product record serves both.

- **What Copilot uses to surface products:** Web information plus the merchant's feed. Microsoft says it draws on "both information found on the web and from a merchant's feed in the Microsoft Merchant Center" (Microsoft Advertising, October 2026). ([Microsoft Advertising, Agentic Commerce](https://about.ads.microsoft.com/en/solutions/technology/agentic-commerce))
- **Shopify stores in Copilot:** Enrolled automatically. Microsoft says Shopify merchants need "no additional onboarding steps"; products reach Copilot through Shopify Catalog (Microsoft Advertising, Shopify Help Center, October 2026). ([Microsoft Advertising, Agentic Commerce](https://about.ads.microsoft.com/en/solutions/technology/agentic-commerce); [Shopify Help Center, Selling on Microsoft Copilot](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/microsoft))
- **What ChatGPT uses to surface products:** Structured metadata, web content, reviews. Price and description from data providers, Shopify Catalog for Shopify stores, other third-party content and review summaries from public websites (OpenAI Help Center, October 2026). ([OpenAI Help Center, Shopping with ChatGPT Search](https://help.openai.com/en/articles/11128490-shopping-with-chatgpt-search))
- **Copilot direct checkout:** On by default for eligible stores. Shown only to customers based in the US, with no fee beyond payment processing; ChatGPT sends buyers to your own checkout instead (Shopify Help Center, October 2026). ([Shopify Help Center, Selling on Microsoft Copilot](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/microsoft); [Shopify Help Center, Selling on ChatGPT](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/chatgpt))

## Deploi's call

For a Shopify store, Copilot and ChatGPT are one product-data project, not a feed project plus a content project, because both read the same Shopify Catalog record. We scored agentic commerce readiness, the work that makes a catalog readable by AI agents, CUSTOMIZE: build the data foundations now and wait on bets tied to any one agent protocol (Deploi verdict, August 2026).

**CUSTOMIZE: Build one product record for both engines when**

- Products in Shopify Catalog lack complete titles, descriptions, options, images, prices or availability, the fields Shopify lists for AI channels ([Shopify Help Center](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/products), October 2026).
- Specs, fit or compatibility live in custom data. Shopify Catalog Mapping reads metafields, metaobjects and tag prefixes, and Deploi's [agentic commerce readiness record](https://deploi.ca/shopify/build-vs-buy/agentic-commerce-readiness-feeds) scores that attribute work CUSTOMIZE (October 2026).
- Your return and refund policy is incomplete. Shopify's Copilot and ChatGPT channels both require it ([Shopify's Copilot](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/microsoft) and [ChatGPT pages](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/chatgpt), October 2026), and Microsoft names returns and support policies as signals ([Microsoft Advertising](https://about.ads.microsoft.com/en/solutions/technology/agentic-commerce), October 2026).

**WAIT: Skip a Copilot-only project while**

- Your store runs on Shopify, where Microsoft says merchants "have been automatically enrolled" ([Microsoft Advertising](https://about.ads.microsoft.com/en/solutions/technology/agentic-commerce), October 2026), so a separate Copilot feed duplicates Shopify Catalog.
- A vendor sells an agent protocol integration, a bet Deploi's [readiness decision record](https://deploi.ca/shopify/build-vs-buy/agentic-commerce-readiness-feeds) keeps on WAIT until a standard settles (October 2026).

## What does Microsoft say Copilot uses to choose which products to show?

Microsoft says Copilot chooses which products to show from two inputs: web information and the merchant's product feed. Microsoft's FAQ on surfacing products in organic results says it draws on "both information found on the web and from a merchant's feed in the Microsoft Merchant Center" ([Microsoft Advertising](https://about.ads.microsoft.com/en/solutions/technology/agentic-commerce), October 2026).

Microsoft calls "trusted product truth" the foundation of agentic commerce. It says Microsoft Merchant Center will support the Universal Commerce Protocol (UCP), "enabling richer signals (returns/support policies) so AI can assess products with confidence" ([Microsoft Advertising](https://about.ads.microsoft.com/en/solutions/technology/agentic-commerce), October 2026). Microsoft's agentic commerce page names no page format or copy style, so the case for [one product page that serves every AI engine](https://deploi.ca/shopify/faq/product-page-structure-chatgpt-vs-perplexity-vs-gemini) holds for Copilot too.

## How does a Shopify store's catalog reach Copilot?

A Shopify store's catalog reaches Copilot through Shopify Catalog, with no Microsoft Merchant Center setup. Microsoft says "Shopify merchants have been automatically enrolled (with controls in Shopify admin). There are no additional onboarding steps required" ([Microsoft Advertising](https://about.ads.microsoft.com/en/solutions/technology/agentic-commerce), October 2026). Shopify adds: "You don't need to do anything for your products to be discovered by Microsoft Copilot through Shopify Catalog" ([Shopify Help Center](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/microsoft), October 2026).

**Shopify stores reach Copilot through Shopify Catalog, while Merchant Center serves merchants who onboard directly**

| Onboarding path | What the merchant supplies | Who it fits |
| --- | --- | --- |
| Shopify | Nothing extra: Shopify Catalog sends the product data | Shopify stores, enrolled automatically |
| Microsoft Merchant Center | A feed with native checkout eligibility, product warnings and Merchant Item ID, plus return policy and customer support settings | Merchants onboarding directly with Microsoft |
| PayPal or Stripe | An integration through PayPal's or Stripe's agentic commerce tools | Merchants who onboard through a payments partner |

Sources: [Microsoft Advertising, Agentic Commerce](https://about.ads.microsoft.com/en/solutions/technology/agentic-commerce); [Shopify Help Center, Selling on Microsoft Copilot](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/microsoft). Verified October 8, 2026.

Microsoft's FAQ still says Copilot Checkout needs a Microsoft Merchant Center account, while the same page says Shopify merchants are enrolled automatically. So confirm the Microsoft Copilot channel's status in your Shopify admin rather than assume either reading.

## What does OpenAI say ChatGPT uses to choose which products to show?

OpenAI says ChatGPT chooses which products to show from structured product data, outside content and the shopper's context ([OpenAI Help Center](https://help.openai.com/en/articles/11128490-shopping-with-chatgpt-search), October 2026):

- **Structured metadata** "from first-party and third-party providers (e.g., price, product description)". For Shopify stores that data arrives "through Shopify Catalog".
- **Other third-party content**, including review summaries "based on reviews from public websites".
- **The shopper's context**, "such as Memory or Custom instructions", and "Model responses generated by ChatGPT before it considers any new search results".
- **Which merchant to list** for a product, ranked "based on factors like availability, price, quality, and whether they are the maker or primary seller of that item".

ChatGPT's written answers are a separate surface. They cite pages that OAI-SearchBot, OpenAI's search crawler, surfaces in ChatGPT search ([OpenAI Developers](https://developers.openai.com/api/docs/bots), October 2026), and ChatGPT search sometimes partners with other search providers ([OpenAI Help Center](https://help.openai.com/en/articles/9237897-searching-the-web-with-chatgpt), October 2026). So a product record drives ChatGPT's product results, and crawlable pages drive its written answers.

## Which content format works for both Copilot and ChatGPT?

The format that works for both Copilot and ChatGPT is a complete product record, because both engines read Shopify Catalog. Shopify lists products there "with their title, description, options, images, price, availability" and other attributes, and advises "complete and well-structured product information" ([Shopify Help Center](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/products), October 2026). Shopify Catalog Mapping reads custom attributes from metafields, metaobjects and tag prefixes.

**Copilot and ChatGPT read the same Shopify Catalog record and name different signals**

| Criterion | Microsoft Copilot | ChatGPT |
| --- | --- | --- |
| How a Shopify store's products arrive | Shopify Catalog, enrolled automatically | Shopify Catalog, discovered automatically |
| What the engine says it weighs | Web information and the merchant's feed | Structured metadata, third-party content, public reviews, shopper context |

Sources: [Microsoft Advertising, Agentic Commerce](https://about.ads.microsoft.com/en/solutions/technology/agentic-commerce); [Shopify Help Center, Selling on Microsoft Copilot](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/microsoft); [Shopify Help Center, Selling on ChatGPT](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/chatgpt); [OpenAI Help Center, Shopping with ChatGPT Search](https://help.openai.com/en/articles/11128490-shopping-with-chatgpt-search). Verified October 8, 2026.

The page still matters, which means it has to agree with the record: Copilot reads web information, and ChatGPT summarizes reviews from public websites. [One team owning the feed and the page copy](https://deploi.ca/shopify/faq/ai-product-feed-vs-page-copy-ownership) keeps the two aligned, and [where each AI channel completes the purchase](https://deploi.ca/shopify/faq/checkout-cart-experience-ai-search-visibility) has its own answer.

## When is a Copilot-specific content project the wrong move?

A Copilot-specific content project is the wrong move before Copilot's own numbers justify it, and in three more cases besides, because Copilot already reads your Shopify Catalog record and your crawlable pages.

> **When not to do this**
> - **When you have not read Copilot's own numbers.** Shopify reports sales, orders, online store sessions and conversion for each AI channel you sell on, under Sales channels > Agentic, though not yet for headless stores ([Shopify Help Center](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/agentic-home), October 2026). Read Copilot's line before you fund Copilot-only work.
> - **When you do not sell to US buyers.** Microsoft opens Copilot Checkout only to "English-language merchants who sell to US buyers", in US dollars ([Microsoft Advertising](https://about.ads.microsoft.com/en/solutions/technology/agentic-commerce), October 2026), and Shopify's ChatGPT channel also requires selling to US customers ([Shopify Help Center](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/chatgpt), October 2026). Outside that rule, in our judgment, crawlable pages are your lever on both engines.
> - **When the plan fills feed fields with placeholder values to pass validation.** A spec-perfect feed built on thin product data is still thin to an agent that reads the page, as Deploi's [agentic commerce readiness record](https://deploi.ca/shopify/build-vs-buy/agentic-commerce-readiness-feeds) warns (October 2026).
> - **When the plan rewrites page copy for each engine.** Neither Microsoft nor OpenAI names a copy format, so per-engine variants have no documented payoff.

## Deploi's point of view

**Where we disagree.** The feed-app category sells rules engines as the fix for feed quality. A rules engine reshuffles fields; it cannot invent an attribute your catalog never captured.

**How we scope it.** attribute backfill as its own line. In our judgment it is the hidden half of every feed project: defining metafields is fast, populating them across a live catalog is not, and it is the line we see cut first when an estimate is trimmed.

**What this page adds.** what Microsoft and OpenAI each say their engines use to choose products, and that on Shopify both read the same Shopify Catalog record, so Copilot needs no separate feed project.

## When this answer changes

- Microsoft publishes how Copilot ranks products, or names attributes it weighs beyond web information and the merchant feed.
- Microsoft Merchant Center's Universal Commerce Protocol support starts reading return and support policy signals for Shopify stores.
- Copilot Checkout opens to buyers outside the US, or to merchants outside English and US dollars.
- OpenAI changes what ChatGPT considers when it surfaces products, or brings checkout back inside ChatGPT for Shopify stores.
- Shopify changes which AI channels read Shopify Catalog, or stops enrolling stores in Copilot automatically.

## Sources

1. [Microsoft Advertising, Agentic Commerce](https://about.ads.microsoft.com/en/solutions/technology/agentic-commerce), checked October 8, 2026
2. [Shopify Help Center, Selling on Microsoft Copilot](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/microsoft), checked October 8, 2026
3. [Shopify Help Center, Selling on ChatGPT](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/chatgpt), checked October 8, 2026
4. [OpenAI Help Center, Shopping with ChatGPT Search](https://help.openai.com/en/articles/11128490-shopping-with-chatgpt-search), checked October 8, 2026
5. [Shopify Help Center, Shopify Catalog and product discovery for agentic storefronts](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/products), checked October 8, 2026
6. [OpenAI Developers, Overview of OpenAI Crawlers](https://developers.openai.com/api/docs/bots), checked October 8, 2026
7. [OpenAI Help Center, Searching the web with ChatGPT](https://help.openai.com/en/articles/9237897-searching-the-web-with-chatgpt), checked October 9, 2026
8. [Shopify Help Center, Managing agentic storefronts](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/agentic-home), checked October 9, 2026
9. [Deploi Build vs. Buy, Should You Build or Buy Agentic Commerce Readiness on Shopify?](https://deploi.ca/shopify/build-vs-buy/agentic-commerce-readiness-feeds), checked October 8, 2026, Deploi research