I have these massages on some of my products that are available on my website for a year
Topic summary
Shopify flags Google/YouTube sales channels with “Limited performance due to missing identifiers (GTIN, MPN, brand)” for handmade candles, while Google Merchant Center (GMC) shows mixed approval; a translated site may be creating duplicate listings, but this wasn’t resolved.
Actions taken: in GMC, products were set as one-of-a-kind with no GTIN and feed rules were added; advisor recommended basing rules on GTIN (not just ‘identifier exists’) to avoid future issues. After applying rules, GMC shows no errors, but Shopify still displays the warning.
Guidance: rely on GMC as the source of truth; Shopify’s app can lag or show inaccurate status, so the Shopify warning can be ignored if GMC is clean.
Image review: GMC image processing can take up to 1.5 months, so “image under review” after several weeks can be normal.
Demand Gen warning: if no Demand Gen campaign is running, ignore. If running, remove text-like overlays from images and avoid sensitive words (political, sexual, healthcare) in titles.
Status: identifier-related issues are resolved in GMC; Shopify notice likely a non-blocking bug. Key question on translation/duplicate products remains open.
Definitions: GTIN = global trade item number (barcode-like); MPN = manufacturer part number; brand = product brand name.
