Merchant Center legend Emmanuel Flossie discovered that Shopify merchants preparing to migrate the Google & YouTube app are being warned about a product ID change that could disrupt Google Ads performance.
After migration, product IDs may switch from country-specific formats such as Shopify_US_12345_67890 to a new format using ZZ, for example, Shopify_ZZ_12345_67890.
Because Google treats the updated IDs as new products, advertisers could lose the connection to historical clicks, conversions, campaign learning, and optimization data.
This may cause a temporary decline in campaign performance while Google rebuilds its understanding of the product catalogue.
A second concern is that the updated app may automatically submit product feeds for all enabled Shopify Markets, rather than only the merchant’s primary market.
Merchants are advised not to uninstall and reinstall the app without first reviewing their feed setup.
One suggested solution is to use a third-party feed management app. This may allow businesses to retain their existing product ID structure and preserve historical advertising data.
The issue cannot be resolved using Google Merchant Center feed rules, as product IDs in a primary feed cannot be changed through those rules.
Recovery times may vary. Well-optimized accounts could recover within a few days, while accounts with less data or weaker optimization may take several weeks or longer.
The migration deadlines are February 28, 2026, for beta Merchant API users and August 18, 2026, for Content API users.
Link: https://lnkd.in/eJSr6_wJ
