Google Shopping ads place your products directly in search results with images, prices, and your store name — capturing shoppers at the moment of highest purchase intent. For eCommerce businesses, Shopping campaigns typically deliver the best ROAS (return on ad spend) of any paid channel. But performance depends heavily on feed quality, campaign structure, and bidding strategy. Here is how to get it right.
Setting Up Your Product Feed
Your product feed is the foundation of Google Shopping. It is the structured data file that tells Google everything about your products — titles, descriptions, images, prices, availability, and attributes. Feed quality directly determines which searches your products appear for, how prominently they display, and ultimately how they convert.
Critical feed optimisations:
- Product titles: Include the most important keywords — brand, product type, key attributes (size, colour, material). "Nike Air Max 90 Men's Running Shoes Black Size 10" outperforms "Air Max 90" because it matches more specific search queries.
- High-quality images: Use clean product photography on a white background as the primary image. Lifestyle images can be added as additional images. Google rejects blurry, watermarked, or promotional overlay images.
- Complete attributes: Fill in every relevant attribute — colour, size, material, age group, gender, product type, GTIN. More complete product data means Google can match your products to more relevant queries.
- Accurate pricing and availability: Mismatches between your feed and landing page result in disapprovals. Set up automatic feed updates or use the Content API for real-time synchronisation.
Campaign Structure
Google's Performance Max campaigns are now the primary Shopping campaign type, using AI to distribute ads across Search, Shopping, Display, YouTube, and Discover. While Performance Max simplifies management, it reduces visibility into where your budget is spent. Supplement with standard Shopping campaigns for your top-performing products where you want more control over bids and search terms.
Segment your campaigns by product category, margin level, or performance tier. High-margin products can support more aggressive bidding. Best sellers with proven conversion rates deserve dedicated budget allocation. New or unproven products should start in separate campaigns with conservative budgets until you gather performance data.
Bidding Strategy
For most eCommerce advertisers, target ROAS (return on ad spend) bidding delivers the best results once you have sufficient conversion data — generally at least 50 conversions over 30 days. Start with Maximise Clicks or Maximise Conversions to gather data, then transition to target ROAS once the algorithm has enough signal.
Set realistic ROAS targets. If your average product margin is 40%, a 400% ROAS (4:1 return) represents a break-even point before accounting for operational costs. Start with a target slightly below your ideal ROAS to give the algorithm room to learn, then tighten it gradually as performance stabilises.
Negative Keywords and Search Term Refinement
Unlike text ads, you cannot target specific keywords in Shopping campaigns. Google matches your products to search queries based on your feed data. But you can add negative keywords to prevent your products appearing for irrelevant searches. Review your search terms report regularly and exclude terms like "free", "DIY", "repair", or competitor brand names (unless you intentionally want to compete on those terms).
The search terms report also reveals opportunities. If customers frequently search for attributes you have not included in your product titles, add them. If certain long-tail queries consistently convert well, optimise your feed to better match those terms.
Measuring and Scaling
Track ROAS at the product level, not just the campaign level. Some products will deliver outstanding returns while others consume budget without converting. Pause or reduce bids on consistently unprofitable products. Scale budget on winners by increasing daily budgets gradually — sudden large increases can destabilise automated bidding.
At Born Digital, we help eCommerce clients build and optimise their Google Shopping presence from feed setup through ongoing campaign management. The businesses that see the best results invest in feed quality first — ensuring their product data is comprehensive, accurate, and keyword-rich — before focusing on bidding strategy. A well-optimised feed is the prerequisite that makes everything else work.