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Google Ads · MarketplacesGoogle Ads × Marketplaces

Google Ads conversion tracking for marketplace sellers

This page exists to say something most vendors will not: if your sales happen on Amazon, Etsy or Walmart, the marketplace owns the customer, the checkout and the data, and the per-order click attribution this site builds for other platforms is not available to you. What Google Ads adds on top of that is a mechanical requirement: gclid, gbraid and wbraid have to reach the record that holds the money, because Google Ads can only credit a conversion it can tie back to a click it recognizes. This page covers both halves — what a conversion is in marketplace sellers, and what Google Ads specifically needs to accept it.

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By Ariful IslamGoogle Ads · Marketplaces, in short ↓

Specific to Google Ads × Marketplaces

Google Ads to an Amazon listing: Attribution tags, no gclid join

Google Ads cannot record a conversion for an order placed on Amazon, Etsy or Walmart, because no gclid reaches the marketplace order. Sellers sending Google traffic to Amazon should append Amazon Attribution tags for aggregate sales reporting, and create real conversion actions only for their own direct store, where gclid capture and offline import work normally.

The usual setup is Search ads pointing at an Amazon listing or Brand Store, with Google Ads showing clicks and nothing else. With no conversions, bid strategies that depend on conversion data have nothing to learn from, so these campaigns belong on manual CPC or Maximize clicks with tight keyword control. Resist creating a conversion action for visits to a bridge page; it teaches bidding to buy curious clicks.

Amazon Attribution tags on the final URL give Amazon's aggregate view of detail-page views, add-to-carts and purchases per tag. Use at least one tag per campaign and line up reporting periods, since Amazon's figures arrive later and follow Amazon's attribution rules rather than Google's. Brand Registry sellers should also check eligibility for Amazon's Brand Referral Bonus, which pays a bonus on qualifying sales from tagged external traffic.

Google Shopping runs from a Merchant Center feed for a website you control, so a seller with a Shopify store beside Amazon often sees Shopping clicks land on the direct store while Search clicks go to Amazon. The direct-store side gets a full build: gclid, gbraid and wbraid captured, purchase as the primary action, Enhanced Conversions on. Keep separate campaigns for each destination, so a conversion-based bid strategy never ends up spending on Amazon-bound traffic it cannot see convert.

Google Ads · Marketplaces · what breaks

Why Google Ads under-reports for marketplace sellers

  1. 01

    The marketplace owns the checkout and the customer

    You get an order report, not a click-to-order join. No tool changes this.

  2. 02

    Off-marketplace ads that cannot be attributed per order

    You can drive traffic to a listing and you cannot see which click produced which sale.

  3. 03

    Vendors selling per-order attribution that does not exist

    The most common thing sold into this category, and it does not work the way it is described.

  4. 04

    Gclid, gbraid and wbraid never reaches the record

    Three parameters, not one. gclid is the long-standing identifier; gbraid and wbraid arrive on iOS traffic where privacy constraints prevent the usual one. Capture code that names only gclid loses a growing share, silently, and the loss is invisible until you audit how many records carry an identifier.

Google Ads · Marketplaces · the fix

What working looks like — Google Ads · Marketplaces

  • A clear statement of what can and cannot be measured

    Before you spend anything, so the decision is informed.

  • The marketplace's own tools used properly

    Attribution programs, brand analytics and promo-code tracking each do something real within their limits.

  • Your own channels measured properly

    If you also sell direct, that side is fully measurable and is usually where the attention should go.

Google Ads · Marketplaces · architecture

How Google Ads and marketplace sellers actually connect

  1. 1

    The conversion in marketplace sellers

    The conversion map here is mostly a map of what is missing. The marketplace records the order and shares an aggregate; there is no identifier that travels from your ad to that order, so the events below are the honest maximum.

  2. 2

    Google Ads needs a click to match

    A click identifier inside the 90-day window, a conversion action name that matches one configured in the account, a conversion timestamp for when the outcome happened, and a value. Read the match rate after uploading — a file can upload perfectly and match nothing.

  3. 3

    The identifier: gclid, gbraid and wbraid

    Three parameters, not one. gclid is the long-standing identifier; gbraid and wbraid arrive on iOS traffic where privacy constraints prevent the usual one. Capture code that names only gclid loses a growing share, silently, and the loss is invisible until you audit how many records carry an identifier.

  4. 4

    Where it gets sent from

    The marketplace's own order and settlement reports, with their aggregation level understood before anything is compared.

  5. 5

    Deduplication and window

    There's no shared event ID mechanism like Meta's. What matters instead is the counting setting on each conversion action — 'one' for lead-type conversions so a repeat submitter doesn't count three times, 'every' for ecommerce where a second purchase is a second sale. This is the single most common misconfiguration we find in Google Ads accounts. Google's offline import window is 90 days from the click. Anything older can't be matched, and rows outside it fail as unmatched without much explanation. Measure your median click-to-outcome time against that before designing anything.

Google Ads · Marketplaces · events

The conversion map for marketplace sellers

Five things, only some of which are measurable, and the page says which.

Off-marketplace ad clickMeasurable on your side. It stops being traceable the moment it reaches the listing.
Listing viewAvailable in aggregate through the marketplace's own analytics, not per visitor.
Order placedThe marketplace records it. No click identifier attached, ever.
Attribution program reportingAggregate and delayed where the marketplace offers it. Directional, not reconcilable.
Promo code redemptionThe one clean per-order signal you can create yourself.

Google Ads · Marketplaces · diagnose

Diagnostic order — Google Ads · Marketplaces

  1. 01

    Count records carrying gclid, gbraid and wbraid

  2. 02

    No click identifier on the order

    The structural fact underneath everything else on this page.

  3. 03

    Aggregate reporting treated as measured conversions

    Marketplace attribution programs report at a level that cannot be reconciled per order, and trying to will waste weeks.

  4. 04

    Customer data the marketplace will not release

    Which also limits what remarketing and matching are possible.

  5. 05

    Read the match rate on the upload, not the success message

    A conversion action that stops receiving hits is flagged as inactive 30 days later — by which point a month of budget has already run against a missing signal. Check the last-received date on every action monthly; it takes two minutes and it's the cheapest monitoring available.

Google Ads · Marketplaces · prove

How it gets proven — Google Ads · Marketplaces

Source of truth

The marketplace's own order and settlement reports, with their aggregation level understood before anything is compared

  • A plain statement of what is and is not attributable, before any work is commissioned.
  • Promo-code redemptions reconciled per order where that mechanism is used.
  • Direct-store revenue measured fully and reported separately from marketplace revenue.
  • No number presented as measured when it came from an aggregate model.
  • The match rate on the upload, not the success message read directly, not inferred from an upload succeeding.

Google Ads · Marketplaces · free audit

What we check in the free audit

  • Count records carrying gclid, gbraid and wbraid
  • No click identifier on the order
  • Aggregate reporting treated as measured conversions
  • Customer data the marketplace will not release
  • Read the match rate on the upload, not the success message

Checked against

The marketplace's own order and settlement reports, with their aggregation level understood before anything is compared

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Google Ads · Marketplaces · when not to buy

When you don't need this — Google Ads · Marketplaces

  • If Google Ads already reports conversions that reconcile against the marketplace's own order and settlement reports within a few percent, this is working and there is nothing to buy.
  • Measure identifier coverage yourself first — pull your last hundred records and count how many carry gclid, gbraid and wbraid.
  • If you're running Performance Max exclusively and haven't separated your conversion actions, the import will work and the reporting won't tell you much. Worth sorting the account structure first.

Google Ads · Marketplaces · what we deliver

What gets built — Google Ads · Marketplaces

  • Marketplace attribution tools configured where they exist

    Amazon's attribution program and equivalent tools give aggregate rather than per-order insight. Useful, and not the same thing.

  • Unique promo codes or landing paths per channel

    The practical way to separate channels without a click join.

  • Your direct-to-consumer store measured fully

    Where a real per-order build is possible and worth doing.

  • Nothing claimed that the data cannot support

    The reporting states its own limits.

  • Dispatch via Google's offline conversion import

    Uploaded against the click identifier, either through the Google Ads API or as a file. The upload is the easy part; what limits it is how many of your records carry an identifier at all. Verify the current column format against Google's own template — it has changed before.

Written guarantee

95%+ tracking accuracy

Measured against The marketplace's own order and settlement reports, with their aggregation level understood before anything is compared. Miss it and we keep working at no cost.

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FAQ

Google Ads · Marketplaces questions, answered

Generally no. Shopping ads come from a Merchant Center feed for a website you control, so they point to your own store; Search ads can link to Amazon, but check the destination meets Google's requirements.

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