Setting Up Merchant Center for AU/US/UK Markets

11 min · text · Intermediate

Merchant Center is where your products live on Google. Get it wrong and your feeds will be rejected, your products hidden, your ads disappear. Today we build a feed that passes every audit — and scales across AU/US/UK without restarting.

Merchant Center: the feed that powers Shopping and PMax

Google Merchant Center is your storefront's data plane. Every product attribute (title, price, image, category, GTIN, shipping) flows through Merchant Center into Shopping Ads and PMax.

If your feed is wrong, your ads are invisible.

The critical feed attributes (AU/US/UK)

Mandatory (product will not show if missing):

id: Unique product identifier (usually your Shopify product ID)
title: Product name, max 150 characters
description: 5000 character max
price: In target currency (AUD for AU feed, USD for US, GBP for UK)
availability: In stock / Out of stock / Pre-order
image link: HTTPS image URL, min 100x100px, max 64MB
link: URL to product page on your store

Highly recommended (products show, but reach is limited if missing):

gtin: Global Trade Item Number (barcode). Critical for brand products; optional for generics.
brand: Your brand name or supplier name
condition: New / Refurbished / Used (99% of dropshipping is "New")
shipping: If you offer flat-rate shipping (e.g., A 0 to all AU postcodes), declare it here
shipping_weight: For accurate shipping cost estimation

AU-specific (legal/compliance):

shipping_label: If not specified, Google assumes standard shipping; declare express/standard explicitly
tax: If applicable (should be handled via Shopify's GST if you are GST-registered)

The GTIN trap (critical for AU operators)

A GTIN (Global Trade Item Number) is a product barcode: 12–14 digits. Google strongly prefers GTINs. But here is the trap:

If you provide a GTIN and Google finds that same GTIN on a competitor's Shopify store (or Amazon AU), Google merges the products into a single offering. Your ad will compete on your price alone, in a Google Shopping "knowledge panel" with 10 other sellers.

When to include GTIN:

You are drop shipping a famous brand (Apple watch, Nike shoe) and your price is competitive
You have exclusive distribution rights
You want to show up in "product comparison" panels

When to omit GTIN:

You are selling a generic product (phone stand, pet toy) with a rebranded packaging
Your supplier's GTIN is not yours (Alibaba's GTIN ≠ your GTIN)
You are testing a product and the GTIN might change

AU compliance note: Australian Consumer Law (ACL) requires that brand, product name, and material composition be accurately represented. If your supplier is selling "Diamond ABC brand water bottle" and you rebrand it "Aussie Water Bottle," Google will flag the mismatch if GTIN is included.

Recommendation for AU dropshippers: Omit GTIN unless you have exclusive rights or the product is a known global brand (Apple, Samsung, etc.). Google will show your product, just in a smaller pool.

Multi-market feeds: AU → US → UK (without restarting)

Most dropshippers think they need three separate feeds. Not true. One feed, three price configurations.

Setup (Merchant Center):

Create primary feed (AU): Shopify → Google Merchant Center (via free Shopify integration or Feedonomics)
In Merchant Center, go to Data Feeds
Create new feed: USA market, price in USD, same products
Create new feed: UK market, price in GBP, same products
Each feed uses your Shopify inventory as source; Google syncs automatically

Pricing conversion:

AU price: A