Performance Max for Ecommerce: How to Stay in Control
Feed quality, segmentation, exclusions and targets that keep you in control.
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Key takeaways
- Your product feed decides which searches your products can appear for.
- Titles and images have the biggest effect on visibility and clicks.
- Accurate GTINs, prices and availability keep products approved.
- Custom labels let you bid by margin, season or best-sellers.
Why your feed matters
Google Shopping ads and free product listings don't use keywords the way search ads do. Instead, Google reads your product feed, the data you send through Google Merchant Center, to decide which searches each product is relevant for and how to display it.
That makes Google Shopping feed optimisation one of the highest-impact tasks for any online store. A better feed means your products appear for more relevant searches, look more appealing in results and stay approved.
1. Write better product titles
Titles are the most important attribute for relevance. Front-load the words shoppers actually search for:
| Before | After |
|---|---|
| Aurora Jacket | Women's Waterproof Hiking Jacket – Aurora – Navy – Size 12 |
| Classic Mug | Ceramic Coffee Mug 350ml – Matt Black – Dishwasher Safe |
A useful pattern is product type + key attributes (brand, material, colour, size) + model name. These examples are illustrative; test what works for your products.
Use your search terms report. The searches that trigger your Shopping ads show the exact words customers use. Add the relevant ones to your titles and descriptions.
2. Use strong images
- A clear main image of the product on a plain background.
- No promotional text, watermarks or borders on the main image.
- High resolution, so the product looks good on every screen.
- Additional images showing other angles or the product in use.
3. Fill in the right attributes
- GTIN (barcode number) and brand for branded products, which helps Google match your products to searches.
- Google product category and your own product type structure.
- Colour, size, material, gender and age group for clothing and similar products.
- Accurate price and availability that match your website exactly.
- Shipping and returns information set up in Merchant Center.
- Product highlights and detailed descriptions that explain key benefits.
Mismatches cause disapprovals. If the price or stock in your feed doesn't match your website, Google can disapprove products or suspend your account. Keep your feed syncing automatically.
4. Use custom labels to bid smarter
Custom labels let you group products in ways that matter to your business, then set different budgets or targets for each group.
- Margin band: high, medium or low margin.
- Best-sellers vs the rest of the range.
- Seasonal products to push at the right time.
- Price range, so expensive items aren't treated like cheap ones.
- Clearance or new arrivals.
These labels are especially useful in Performance Max campaigns, as our guide to Performance Max for ecommerce explains.
Get a free feed reviewWe'll check your titles, attributes and Merchant Center issues.
Get a free proposal 5. Fix Merchant Center issues
- Check the diagnostics in Merchant Center every week.
- Fix account-level issues first, such as missing policies or contact details.
- Then fix product-level errors: missing GTINs, image problems and price mismatches.
- Use supplemental feeds or rules to improve titles and attributes without changing your website.
Don't forget free listings: an optimised feed also helps your products appear in Google's unpaid shopping results.
Common feed mistakes
- Using short, vague titles copied from the website.
- Leaving GTINs, brand or categories empty.
- Prices or stock that don't match the website.
- Main images with text overlays or watermarks.
- Treating every product the same in campaigns, regardless of margin.
Shopping feed FAQs
How often should my feed update?
At least daily, and more often if prices or stock change quickly. Most platforms, including Shopify and WooCommerce, can sync automatically.
Do I need GTINs?
For branded products that have them, yes. Custom or handmade products without barcodes can be submitted without GTINs if marked correctly.
Can I change titles just for Google?
Yes. Feed rules or a supplemental feed let you optimise titles for Shopping without changing your product pages.
Are free listings worth it?
Yes. They cost nothing and use the same feed, so a well-optimised feed brings extra visibility on top of your paid campaigns.
The bottom line
Google Shopping feed optimisation is ongoing work that pays off across every Shopping campaign and free listing. Write descriptive titles, use strong images, complete every relevant attribute, keep prices and stock in sync, and use custom labels to put budget behind your most profitable products.