How it works
How to measure Google Shopping ROAS
Pull campaign metrics from Google Ads
Google Ads > Campaigns > last 30 days. Export: cost, conversion value, clicks, conversions. Filter to just Shopping or Performance Max campaigns if you want channel-specific ROAS.
Factor in COGS
Google Ads reports revenue. It doesn't know your product cost. Calculate total COGS for the orders that came from Shopping ads. ROAS of 5× sounds great until you find out it's on a 70% COGS product.
Check Shopping vs Performance Max separately
Performance Max often outperforms standard Shopping on ROAS but cannibalizes brand search. Breaking them out reveals whether PMax is driving incremental revenue or stealing from other channels.
Google Shopping performance realities
Shopping and PMax differ from Meta and TikTok in two important ways: intent and attribution.
Shopping traffic has higher intent
Meta ads interrupt browsing; Shopping ads appear when someone is actively searching. Conversion rates are typically 2-3× higher on Shopping vs social ads. That's why Shopping ROAS benchmarks are typically higher (3-6×) than social (2-4×).
Product feed quality drives everything
Shopping performance depends on your Merchant Center feed: titles, images, descriptions, Google Product Category, GTIN. A well-optimized feed can 2-3× ROAS on the same ad spend just through better matching.
Review stars in Shopping listings
Products with 4+ stars and 50+ reviews get review extensions in Shopping ads (the gold stars below price). Shopping ads with visible stars get 5-15% higher CTR and 10-20% higher conversion than plain listings.
Performance Max: all-in but opaque
PMax combines Shopping, Display, YouTube, Gmail into one campaign with shared budget. Typical ROAS lift is 15-25% over standard Shopping. Downside: Google decides the channel mix and you can't see which channels contribute.
Branded vs non-branded matters
Branded search (people typing your store name) converts at 5-10× non-branded. A good Shopping ROAS report should exclude branded traffic to see your real acquisition performance. Otherwise, brand volume masks weak acquisition campaigns.
More free tools
All tools →- ROAS calculatorReturn on ad spend for Meta, Google or TikTok campaigns.
- Facebook Ads ROAS calculatorROAS, CPA and profit on ad spend for Meta campaigns.
- TikTok Ads ROAS calculatorROAS, CPA and profit on ad spend for TikTok campaigns.
- PPC budget calculatorDaily ad budget and expected return across channels.
FAQ
Questions, answered
Healthy Shopping ROAS for ecommerce: apparel 4-6×, beauty 3-5×, electronics 4-7×, home 3-5×. Performance Max usually runs 15-25% higher ROAS than standard Shopping. Aim for at least 3× ROAS blended.
For stores new to Google Ads, start with standard Shopping. Learn what works, then layer in PMax. PMax is more automated but needs good historical data and a solid feed to perform. Test for 30 days minimum before judging.
Connect a review source to Google Merchant Center (WiserReview, Google Customer Reviews, Trustpilot, Yotpo all support this). Minimum 50 reviews at 3.5+ stars per product. Once approved, stars appear below your listings automatically.
Common causes: feed quality degraded (images, titles, availability), auction pressure increased (seasonal), competitors lowered prices, or bids were raised past the profit point. Check feed health first (Merchant Center Diagnostics), then review bidding strategy.
For new campaigns: Manual CPC for 30-60 days to build conversion data. Then switch to Target ROAS bidding once you have 100+ conversions. Google's algorithm needs data to optimize; starting with automated bidding on a new account usually underperforms.
Show star ratings in your Shopping ads
WiserReview sends verified review data to Google Merchant Center automatically, so your Shopping ads can show star ratings.
7-day free trial · from $6.75 a month, billed yearly