Demand Gen campaigns can use Merchant Center product data, but products must remain eligible through account linking, policy, campaign filters, and format requirements. Google's current troubleshooting guidance flags campaigns with fewer than four eligible products and notes that some responsive-ad configurations are not supported with product feeds. Gmail support also varies by format, so the live preview and current specification matrix matter.

VISUAL LESSON

What you will learn

  1. 01Trace product eligibility end to end.
  2. 02Diagnose low eligible-product counts and filters.
  3. 03Verify Gmail format support and final previews.
A product catalog moves through eligibility, filter, format, and preview gates while rejected items enter a repair queue
Feed-backed ads depend on the products that remain eligible after policy, filter, and format rules are applied.

ILLUSTRATIVE WORKED EXAMPLE

Reconcile an illustrative feed funnel

Merchant Center itemsProducts in the selected data source
160
ApprovedPolicy and destination eligible
131
Campaign filter matchIncluded by campaign conditions
58
Format-readyEnough compatible items for preview
38
Illustrative example—not a benchmark. Replace every sample value with your own campaign, market, and measurement data.

PRACTICAL INTERFACE MAP

Follow products from source to ad

Merchant Center01Check source and diagnostics

Confirm account link, destination, status, images, price, availability, landing pages, and affected item IDs.

Campaign02Inspect product filters

Reconcile labels, brand, category, item ID, and all-products choices with the actual feed values.

Ad03Verify format and Gmail preview

Use the current asset-specification matrix and preview each eligible format before publication.

Conceptual walkthrough. Labels, controls, and availability can vary by account, region, plan, and interface version; verify the current screen before acting.

STEP-BY-STEP LESSON

Catalog → approval → filter → format → Gmail preview → report

SourceMerchant Center items
GatePolicy and filters
ProofCompatible preview and delivery

THE LEAD ATLAS METHOD

For a B2B market that also uses Gmail Demand Gen, Lead Atlas Data can assemble a separate custom contact list researched for the exact business categories and locations the campaign is trying to reach.See how custom list research works ↗
01

Document the feed-backed campaign

Record the Merchant Center account, Google Ads account, country and language, campaign subtype, product data source, product filters, ad formats, conversion goals, bidding, start date, and exact error or warning. Export the affected item IDs when possible.

Decide whether the campaign should advertise all approved products, a coherent product set, or a labeled promotion. The product group should support one customer job and landing experience, not merely satisfy a minimum count.

02

Verify Merchant Center eligibility

Check account linking, destination status, policy and data-source diagnostics, product approval, image availability, title and description quality, price and availability match, mobile landing page, shipping and returns information where required, and country targeting.

Repair source problems at the source rather than compensating in ad copy. Preserve the original issue, item ID, changed attribute, owner, submission time, review status, and approval result so recurring feed failures can be traced.

03

Reconcile campaign filters

Open the campaign's product-filter logic and compare every included or excluded value with the current feed. Common failure points include mismatched custom labels, changed brand spelling, category hierarchy, item IDs, a promotion label with too few approved items, or an unintended exclusion.

Google's current troubleshooting guidance identifies fewer than four eligible products as a feed issue. Do not add unrelated items just to clear the warning; broaden only to products that fit the offer and destination.

04

Confirm format compatibility

Use Google's current Demand Gen product-feed asset and specification matrix to verify which formats and surfaces can use the feed, including Gmail support. The documentation notes that responsive ads with auto-generated video are not supported for product feeds; verify the current wording and live control.

Build the required uploaded assets beside the feed, inspect product imagery and text combinations, and preview every selected Gmail and non-Gmail format. Check price, availability, product title, image crop, destination, brand identity, and disclosures.

05

Validate delivery and item-level evidence

After launch, reconcile product eligibility, diagnostics, impressions, clicks, conversions, value, disapprovals, item changes, and campaign edits. Use item or product reporting where available and account for conversion delay before replacing the catalog strategy.

Deliverable: linked-account map, Merchant Center diagnostic export, affected item list, product-filter reconciliation, eligible-count check, format-compatibility record, Gmail previews, test destinations, feed change log, product-level report, issue owner, and a repair, broaden, isolate, or pause decision.

THE TAKEAWAY

Start from Merchant Center truth, reconcile every campaign filter, keep enough eligible products for the intended format, and verify the actual Gmail previews before spending.

OFFICIAL REFERENCES

Check the platform’s current instructions.

Platform labels, eligibility, and workflows can change. These official help pages were used to validate this lesson.