Merchant Feed Validator: Common Mistakes and Best Practices

Most problems with merchant Feed Validator aren't caused by not knowing what to do — they're caused by small, easy-to-miss mistakes that compound quietly over time. Here are the ones that come up most often.

Mistake 1: Only checking for missing required fields while ignoring formatting issues (extra whitespace, wrong currency codes) that also cause silent disapprovals.

Mistake 2: Validating a sample of products instead of the full feed, missing category-specific errors that only affect a subset of your catalog.

Mistake 3: Treating a passed validation as a guarantee of approval — validators check structure, not policy compliance (like misleading pricing or restricted categories).

The fix for most of these isn't more effort, it's a regular check. A few habits that prevent them from creeping back in:
- Confirm GTIN/MPN formatting matches the required pattern for your product category — malformed identifiers are a very common, easy-to-miss rejection reason.
- Validate currency and price formatting per target country if you're running multi-region feeds — a comma-vs-period decimal mismatch alone can invalidate every row.

Worth reading alongside this: our guide to google_product_category, which covers the adjacent side of the same part of a technical SEO audit.

Merchant Feed Validator catches most of this automatically, which is the easiest way to stop these mistakes from shipping in the first place.

Everything in this guide runs directly in your browser — no signup, no install.