Google Ads for E-Commerce: What Works, What Wastes

The short answer

The short answer E-commerce paid search is a feed business. Shopping, collectibles and gifts average $4.14 per click and a 4.01% conversion rate, so the difference between profit and loss sits in product data quality, brand separation and margin-aware targets. Performance Max without brand exclusions is the most common way stores overpay for sales they already had. The.

The short answer

E-commerce paid search is a feed business. Shopping, collectibles and gifts average $4.14 per click and a 4.01% conversion rate, so the difference between profit and loss sits in product data quality, brand separation and margin-aware targets. Performance Max without brand exclusions is the most common way stores overpay for sales they already had.

The context you are bidding into

IRP Commerce market data for July 2026 recorded an average conversion rate of 2.22%, up 16.21% year over year, an average order value of £122.26, and mobile at 62.40% of sales. In that dataset Google paid search accounted for 60.28% of sales on a last-click basis.

Meanwhile the LocaliQ search advertising benchmarks for the period ending 1 June 2026 put shopping, collectibles and gifts at $4.14 average cost per click, an 8.28% click-through rate, a 4.01% conversion rate and $49.40 average cost per lead. WordStream 2026 Google Ads benchmarks, covering April 2025 to March 2026 across 13,474 US campaigns, notes tariff pressure pushing retail costs up while overall cost per lead fell for the first time in five years.

The takeaway for a store: your click is cheap relative to legal or home services, but your conversion rate is thin and your order value is fixed. There is very little room between a well-run account and an unprofitable one.

Take the free surface before the paid one

Google surfaces product data at no media cost across Search, the Shopping tab, Images, Lens, YouTube, Maps and Business Profile, provided required attributes are present and you have configured shipping and added return policy information (Google free product listings). Most stores running Shopping ads have never audited their eligibility for the free placements sitting next to them.

Do the feed work before raising budgets. Titles carrying brand, product type and the differentiating attribute in the first 70 characters. GTIN or MPN populated. Availability accurate and refreshed. Product structured data on the page matching the feed, using the merchant listing properties that carry price, availability, shipping and returns (Google Product structured data). A feed error is an invisible tax on every campaign above it.

Separate brand from everything else

The single most common overspend in retail accounts is brand traffic absorbed into a blended Performance Max campaign and reported as incremental revenue. Google’s documentation confirms Performance Max spans Search, YouTube, Display, Discover, Gmail and Maps from one campaign, and that campaign-level reporting is more limited than in search campaigns (Google Performance Max documentation).

Run brand as its own search campaign with exact match. Exclude brand terms from Performance Max. Then look at what the remainder produces, because that is the number that tells you whether paid search is growing the business or invoicing you for it.

Set targets on margin, not revenue

Metric	Common practice	Better practice
Conversion value	Order revenue	Gross profit per order, passed into the conversion
Target	Blended ROAS goal	Contribution-margin target by product group
Audience	All buyers	Existing customers excluded from prospecting
Feed segmentation	One campaign, whole catalogue	Split by margin band and by bestseller status
Returns	Ignored	Netted off before judging a product group

A 4:1 return on ad spend is excellent at 60% gross margin and loss-making at 20%. Passing profit rather than revenue as the conversion value is a half-day of work that changes every bidding decision the system makes afterwards.

What to stop paying for

Stop running Performance Max with brand included. Stop advertising out-of-stock or low-stock SKUs, which burns budget and produces refunds. Stop bidding broad on generic category terms where marketplaces outbid you structurally. Stop prospecting to existing customers at full acquisition cost when an email would have worked. Stop optimising to last-click revenue on a mobile-majority catalogue, given 62.40% of sales in the IRP data came from mobile where cross-device paths are common.

And stop scaling budget in response to a good week. Retail demand is seasonal and weather-sensitive; a 20% increase applied on Tuesday usually reads as performance decay by Friday because the learning period resets.

The account shape that holds up

Brand search, exact match, capped. Non-brand search on high-intent product and model queries. Shopping or Performance Max on the catalogue split by margin band, brand excluded. A remarketing layer with recent purchasers excluded. Seasonal campaigns built four to six weeks ahead of the peak rather than during it.

Then test incrementality properly at least twice a year with a geographic holdout rather than trusting platform-reported conversions alone. That discipline, plus conversion work on the product and cart pages, is usually worth more than another percentage point of bid efficiency. It also pairs with the organic and feed work that reduces how much of the catalogue you have to rent.

Mobile changes the creative and the checkout

With mobile at 62.40% of sales in the IRP data, the constraint on a retail account is usually the phone experience rather than the auction. Three things routinely cost more than a bid change. Product images that require pinch-zoom to read a size chart. Shipping cost revealed only at the final checkout step. And a promotional banner that consumes the top third of the screen on a small viewport, pushing the add-to-cart button below the fold.

Fix those before increasing spend, because every improvement to conversion rate applies to the whole account at once. At a 2.22% baseline conversion rate, moving to 2.6% is a 17% increase in orders on identical media, which no bidding strategy will match in the same quarter.

The bottom line

Fix the feed, split brand out, pass profit instead of revenue as the conversion value, and exclude existing customers from prospecting. Those four moves decide whether a retail account compounds or quietly consumes margin.

Tack Media is a Google Partner and Shopify Partner and has run e-commerce accounts since 2009. For a feed and account audit, book at calendly.com/tack-media-agency/talk-to-an-expert or call 310-620-1141.