What is Google Merchant Center?
Malthe Weibeck Thomsen · Growth Hacker · Senior Pull Specialist · 8 July 2026 · 3 min.
Definition
Google Merchant Center is the platform where you upload and manage your product feed, so products can appear in Shopping ads, Performance Max and free product listings.
Also called: Merchant Center, Google Merchant Center, GMC
Sådan virker det
custom_label_0 → tROAS pr. margin-bucket → budgettet flyder mod profit
I Shopping og Performance Max er feedet dine “keywords”. Titler, produkttype og billede afgør, hvad du matcher på — og et custom_label med margin-bucket lader dig byde højere på de produkter, der faktisk tjener penge.
01The feed's quality control
Merchant Center is the gate all Shopping budget has to pass through. Here the feed is validated against Google's requirements: correct titles, prices, availability, GTINs, images and product categories. Disapproved or flagged products don't show — so an error in Merchant Center can silently pull an entire product group out of advertising, without it being visible in the campaign itself.
That's why Google work often starts here: cleaning up diagnostics, ensuring valid GTINs, avoiding price mismatches between feed and website, and keeping the feed fresh. A healthy Merchant Center is the prerequisite for bidding and feed optimisation to work at all.
Frequently asked questions
Why are my products getting disapproved in Merchant Center?+
Typically due to price mismatches between feed and website, missing or invalid GTINs, broken image links, or policy issues. Disapproved products don't show in the ads, so the diagnostics should be checked regularly.
What is a GTIN, and why does it matter?+
A GTIN (Global Trade Item Number, e.g. EAN/UPC) is the product's unique ID. Correct GTINs help Google match your products to searches and can improve visibility and performance in Shopping.
Related terms
Glossary
What is Standard Shopping?
Standard Shopping is a Google campaign type that shows product ads (image, price, store) based on your product feed, with more manual control than Performance Max.
Read the entry →Glossary
What are custom labels?
Custom labels (custom_label_0 through 4) are optional fields in the product feed where you can tag products with your own criteria — for example margin, bestseller status, season or stock level.
Read the entry →Glossary
What is Performance Max (PMax)?
Performance Max (PMax) is a Google campaign type that runs across all of Google's inventory — Search, Shopping, YouTube, Display, Gmail and Maps — steered by one algorithm toward a single conversion goal.
Read the entry →
Malthe Weibeck Thomsen
Growth Hacker · Senior Pull Specialist at Oaksmond
Pull specialist with 8+ years' experience. Comes from the agency world and has since worked as an independent consultant for several of the country's largest brands.
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