Google Ads for Shopping
Shopping and Performance Max: campaign structure, bidding strategies, tROAS, budgets, and how feed quality drives ad performance.
Shopping ads are won and lost in two places: the auction and the feed. These guides cover both: how to structure campaigns and set bids, and how the product data you send Google quietly decides which queries you're even eligible for.
Fundamentals
Shopping budgets 101
How Google Ads budgets really work for Shopping, daily vs monthly spend, why Google can spend up to twice your daily budget in a day, what budget-limited status means, and how to set a sensible first budget.
Read guide →ReferenceCampaign, ad group and product group structure
How Standard Shopping campaigns are organised, campaigns, ad groups, product groups and how you subdivide them, plus campaign priority and how it all contrasts with Performance Max listing groups.
Read guide →GuideHow much does Google Shopping cost?
Google Shopping costs from £0 (free listings) to whatever you choose to spend on ads. Typical CPC ranges, what actually drives your click price, and how to budget a first month.
Read guide →GuideHow the Shopping auction works
What actually decides which of your products show on Google Shopping, in what position, and at what cost, the feed, your bid, and Quality, plus the second-price idea that sets what you really pay.
Read guide →How-toLinking Merchant Center and Google Ads
How to link a Google Merchant Center account to a Google Ads account, the request-and-approve flow, what the link unlocks, and how to fix the common linking problems that block Shopping campaigns.
Read guide →GuideStandard Shopping vs Performance Max
An honest comparison of Standard Shopping and Performance Max for ecommerce, control, reporting, feed dependency, and when each campaign type wins.
Read guide →Bidding
Bid simulators and the data-thinness problem
How to read Google's bid and budget simulators, why thin-data products break Smart Bidding's predictions, and how pooling lets you reason about products that don't have enough conversions of their own.
Read guide →GuideBudget pacing in Shopping
How Google spends your budget across the day and month, what under- and over-pacing look like, when a campaign is budget-limited, and how to catch pacing problems before they cost you a peak.
Read guide →ReferencePortfolio bid strategy in Google Ads: when pooling campaigns pays
What a portfolio bid strategy is, how it differs from standard campaign strategies for Shopping, how shared budgets interact, and when a portfolio tROAS rescues small campaigns.
Read guide →GuideRamping new products (incubation)
Why new and thin-data products struggle under tROAS, what incubation is, the graduation criteria that promote a product to your main campaign, and how BidSmart's incubator runs the whole process approval-first.
Read guide →GuideSeasonal bidding for Shopping
How to plan bidding around known peaks and troughs, when to use seasonality adjustments, why over-reacting to normal variance costs you, and how to set targets ahead of a season instead of chasing it.
Read guide →GuideThe Google Ads learning period, explained
What actually triggers a Smart Bidding learning period, how long it really lasts, what's safe to change during it, and which "learning" myths cost merchants money.
Read guide →GuideTarget ROAS for Shopping campaigns, explained
How tROAS bidding actually works in Google Shopping, what the algorithm optimises, how to pick a starting target, why product-level analysis beats campaign averages, and the ramp-down trap.
Read guide →GuidetROAS vs Maximise Clicks vs Manual CPC
When each Shopping bidding strategy actually fits, the data each one needs, what it optimises for, and the transition path from a brand-new product to a proven tROAS earner.
Read guide →Feed-driven performance
Using custom labels to segment Shopping campaigns
How to design custom_label_0–4 for Google Shopping, margin bands, price tiers, lifecycle stages and seasonality, and build campaign structure that bids each segment correctly.
Read guide →GuideHow feed quality drives impressions
The causal chain from complete product data to Shopping impression share, how catalog matching, query eligibility and quality signals decide how often your products actually show.
Read guide →How-toNegative keywords for Shopping campaigns
How to steer keyword-free Shopping traffic with negative keywords, mining the search terms report, cutting waste, and using negatives plus campaign priority to route queries to the right campaign.
Read guide →GuidePMax listing groups and feed signals
How Performance Max reads your product feed, listing groups, feed-driven targeting, and why feed quality matters even more when you can't see or steer the queries.
Read guide →GuidePerformance Max search terms, what you can (and can't) see
What query visibility Performance Max actually gives you, including search terms insights, search themes and negative keyword options, the gap vs Standard Shopping, and workarounds.
Read guide →ReferenceCampaign priority settings for Shopping
How Standard Shopping's high/medium/low priority tiers work with shared negatives to control which campaign serves which query, the classic tiered query-sculpting structure and its limits.
Read guide →GuideTitles and query matching in Shopping
Why the product title is the match in keyword-free Shopping, covering front-loading, attribute coverage, and mining the search terms report to close the gap between what shoppers type and what your titles say.
Read guide →Measurement
Attribution for Shopping
How attribution models and conversion windows decide which Shopping products get credit for a sale, and why changing the model changes which products look like winners.
Read guide →ReferenceBenchmarks and auction insights
A reference for the benchmark and auction-insights metrics in Google Shopping, benchmark CTR and CPC, impression share, overlap rate, and which are genuinely actionable versus vanity.
Read guide →How-toConversion tracking for Shopping
How to set up accurate purchase conversion tracking for Google Shopping, the conversion action, tag or GA4 import, conversion value and currency, so value-based bidding has clean numbers to work from.
Read guide →How-toDiagnosing impression drops
An ordered triage checklist for when Shopping impressions fall, disapprovals, budget limits, over-tight targets, feed regressions, seasonality and competition, worked from cheapest cause to hardest.
Read guide →GuideEnhanced conversions in Google Ads, what they are and why Shopping needs them
How enhanced conversions use hashed first-party data to recover conversions cookies miss, why that matters for Shopping value bidding, and the three setup routes.
Read guide →GuideGA4 and Google Ads conversions don't match, here's why
Why GA4 and Google Ads report different conversion numbers, attribution, counting, windows, consent and modelling, which one to bid on, and a reconciliation checklist.
Read guide →GuideROAS vs POAS (profit-based)
Why revenue ROAS misleads across products with different margins, what profit-on-ad-spend measures instead, and how feeding margin into your decisions changes which products deserve budget.
Read guide →GuideWhat is a good ROAS? The honest answer for Shopping
Why there's no universal good ROAS, how to calculate your break-even from margin with worked examples, category benchmarks with caveats, and when a lower ROAS is the smarter target.
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