Microsoft says Copilot builds its product options from four things: the shopper’s prompt, “likely engagement”, available merchant data, and “other factors”. Results come from across the web and from advertisers, and sponsored links are labelled.
For a Shopify store, the practical question is which data road you’re on. A Microsoft Merchant Center feed can inform Copilot’s organic results. It isn’t the only road to checkout, though. Shopify documents Copilot discovery and direct checkout through Shopify Catalog for eligible stores that sell to US customers, and lists no Merchant Center step.
Microsoft’s own pages disagree on whether Merchant Center is required for its other checkout routes. So don’t take any one sentence as the rule. Record which route you’re on, what each source says about it, and what’s still unknown. The worksheet below does that. Checked on 2026-10-27; re-check before acting.
The Microsoft route comparison worksheet
Five things can put a product in front of a Copilot shopper, or move it toward a sale. Fill in the last column for your own store.
| Route | What the official source says | Status and date | Your store: fill in |
|---|---|---|---|
| Shopify Catalog | “You don’t need to do anything for your products to be discovered by Microsoft Copilot through Shopify Catalog.” Direct checkout is on by default for eligible stores that sell to the US. No Merchant Center step listed | Shopify help, current | Catalog-eligible? Selling to US customers? Direct checkout on or off? |
| Microsoft Merchant Center feed | Microsoft uses “information found on the web and from a merchant’s feed in the Microsoft Merchant Center” for organic results | Microsoft program page, current | Do you have an account and a feed? Is it the same data as your Shopify catalog? |
| The open web | Copilot “summarizes and returns relevant results from across the web and from advertisers” | Microsoft support, current | Are your product facts readable as text on the page? |
| PayPal or Stripe checkout | Opt-in, needs “additional support from Stripe and PayPal”. One payment partner per merchant | Microsoft program page, current | Only if you’re not using the Shopify route |
| Advertising | “Sponsored links are clearly identified.” Commissions from other links don’t influence ranking | Microsoft support, current | Any Microsoft Advertising campaigns running? Keep that data apart from organic |
Then add the selection inputs Microsoft names, because they apply to every road:
| Input Microsoft names | What it says | What you can check | Not documented |
|---|---|---|---|
| The shopper’s prompt | Options are based “on your prompt” | Whether your product facts answer the questions customers really ask | How the prompt is matched to products |
| Likely engagement | Named as an input | Nothing directly. You can’t see Copilot’s engagement data | What it measures, and how much it counts |
| Available merchant data | “The details Copilot shows depend on what the merchant provides”: sizes, retailers, review summaries, return windows, price history | Whether your return window and sizes are in your catalog data and policies | Which fields come from which source |
| Other factors | Named, not listed | Nothing | Everything |
“Likely engagement” deserves its own line. It means Copilot isn’t picking purely on specs. Two products with the same facts could rank differently on something you can’t see. Good product data gets you considered. It doesn’t settle the order.
The Merchant Center question, in Microsoft’s own words
The reader decision behind this page is simple to state: Merchant Center can inform organic results, but it isn’t a universal checkout prerequisite. Here is the evidence, in date order, so you can see why that wording is careful.
| Date | Source | What it says about Merchant Center |
|---|---|---|
| January 8, 2026 | Microsoft Advertising launch post (announcement) | “Although MMC is not required to sell through Copilot Checkout, product feeds from MMC help inform organic Copilot results.” Shopify merchants enrolled automatically after an opt-out window |
| June 18, 2026 | Microsoft help page on UCP readiness (current) | How to set up return policy, customer service and product warnings inside Merchant Center |
| October 27, 2026 | Microsoft program page (current) | Onboarding path: “You must have a MMC account and a UCP-compliant feed.” FAQ: “Yes. To onboard to Copilot Checkout, you must have an MMC account.” |
| October 27, 2026 | Same page, Shopify tab (current) | “Shopify merchants have been automatically enrolled (with controls in Shopify admin). There are no additional onboarding steps required.” |
| October 27, 2026 | Shopify help (current) | Requirements list: US customers, Catalog-eligible products, supplemental terms, three store policies. No Merchant Center |
Read together, the most defensible reading is that the Merchant Center requirement applies to Microsoft’s own onboarding paths, while Shopify’s route has its own requirements. That’s our inference. Microsoft’s page doesn’t say which routes its FAQ answer covers. If your plan depends on it, ask Microsoft or Shopify in writing.
What’s not in dispute: Microsoft says a Merchant Center feed informs organic results. If you have one, keep it consistent with your Shopify data. Two copies of the same product that disagree on price or stock give an agent a reason to doubt both.
What the Shopify route asks of you
If you sell on Shopify, this is the route most likely to apply. Here’s what Shopify documents, in the order you’d check it.
1. Is the store in Shopify Catalog at all? Copilot reaches your products through Catalog only if the store is eligible. The plan rule is Starter or higher, not in private mode. There’s one exception: a store on the Agentic plan that hasn’t published an online store on a paid plan can still have products included through agentic storefronts. Each product needs a title, at least one image, a price above 0 and an identifiable product URL. Shopify also reviews account standing over time, including “a track record of genuine sales to real customers”. Our Catalog requirements guide walks through each rule.
2. Do you meet the direct-checkout conditions?
| Condition | Shopify’s wording | Where it bites |
|---|---|---|
| Market | “Your store must sell to customers in the United States.” Checkout “displays only to customers based in the United States” | A store that ships only within Canada doesn’t qualify for checkout. Discovery isn’t covered by this rule |
| Terms | Agree to the Agentic Storefronts Supplemental Terms | Someone with admin rights has to accept them |
| Policies | Terms of service, privacy policy, and return and refund policy completed | A missing return policy blocks eligibility |
| Product types | Subscriptions, bundles, customizable and B2B-only products aren’t supported | Those products may still be discoverable, but can’t be bought in Copilot |
| Delivery | Local delivery, pickup in store and pickup points aren’t supported | Pickup-only items can’t use direct checkout |
| Sign-in | You can’t require customers to sign in before checkout | Members-only stores are affected |
3. What changes in your reporting? Shopify says Google Analytics and custom pixels won’t fire in Copilot’s direct checkout. Only server-to-server “started” and “completed” pixels do. If your ad reports suddenly show fewer conversions, check whether some sales moved into Copilot checkout. Shopify’s agentic sales report counts referral sales and direct-checkout sales together, per channel.
4. Where do legal disclosures go? Shopify asks for relevant legal disclosures in the first 6,000 characters of the product description.
5. How do you opt out? Shopify describes two separate switches for Copilot, one for Catalog access and one for direct checkout, under Sales channels > Agentic. We haven’t seen these screens ourselves. Shopify says turning off Catalog access can take up to 7 days to take effect, and that products may still appear through web crawling. Turning off direct checkout keeps discovery but sends buyers to your store.
One more wrinkle worth recording. Microsoft’s consumer support page says selecting Buy takes the shopper “to the retailer’s purchase page”. Shopify describes a Shopify-powered checkout inside Copilot. Both pages are current. They may describe different surfaces, or the support page may lag. Note both, and don’t promise a customer either experience.
Sponsored results and commissions
Shoppers and merchants both ask whether Copilot is pay-to-play. Here’s exactly what Microsoft says, and no more.
| Statement | Source | What it doesn’t say |
|---|---|---|
| Results come “from across the web and from advertisers” | Microsoft support | How many results are ads |
| “Sponsored links are clearly identified” | Microsoft support | What the label looks like |
| “Except where identified, Microsoft doesn’t receive commissions or other compensation for product suggestions or search results” | Microsoft support | Which results are identified |
| Microsoft “doesn’t use potential commissions from other links to influence ranking” | Microsoft support | How ranking works otherwise |
| “Today, Microsoft does not take a commission or affiliate fee” on Copilot Checkout transactions | Microsoft program page | Whether that will change |
| “No fees associated with selling in Microsoft Copilot’s direct checkout”; you pay standard payment processing | Shopify help | Fees on other routes |
Keep paid and organic apart in your own records. If you run Microsoft Advertising, a sale from a sponsored link tells you nothing about your organic standing.
A worked case: two hypothetical stores
These are labelled hypotheticals, checked against the sources above. Neither is a real store.
| Question | Store A: Shopify, Basic plan, ships to the US, sells humidifiers and a refill subscription | Store B: Shopify, ships only within Canada, sells snowsuits |
|---|---|---|
| In Shopify Catalog? | If the plan, product and account-standing rules are met | Same rules. The Catalog requirements page lists no shipping-country rule |
| Discoverable in Copilot through Catalog? | Shared through Catalog if eligible: “You don’t need to do anything”. Being shown isn’t guaranteed | Not documented. Shopify’s discovery statement isn’t limited to US sellers, but Microsoft lists no market for discovery |
| Direct checkout in Copilot? | For the humidifiers, yes by default if eligible. Not for the refill subscription | No. Shopify requires selling to US customers |
| Needs Merchant Center? | Not for the Shopify route as documented. Optional for organic results | Not for checkout, since it isn’t eligible. Optional for organic results |
| What changes in reporting? | Analytics and custom pixels miss direct-checkout sales | Nothing documented |
| Biggest unknown | How “likely engagement” treats a store with few past sales | Whether Copilot shows Canadian-only stores to US shoppers at all |
Store A’s main job is product data, not paperwork. When Copilot shows sizes, return windows and review summaries, Microsoft says those come from “what the merchant provides”. For a humidifier, that means the room size, the decibel figure with its setting and the runtime per fill belong in the description text. Our constraint-coverage guide shows how to check that one requirement at a time.
How this compares with other assistants
Copilot is the only assistant in this group where the vendor names engagement as a selection input. Our platform comparison puts the routes side by side, and our Shopify agentic storefronts guide covers the admin settings shared with ChatGPT and Meta. For other assistants, see Perplexity, Amazon and Meta’s Muse.
Your next step
Copy the worksheet and fill in the “Your store” column. Then answer three questions in writing: Is the store Catalog-eligible? Does it sell to US customers? Which of your products are subscriptions, bundles, customizable or pickup-only? Those three answers tell you which Copilot route applies and which of your products can be bought in Copilot. Everything after that is product data.