Google Ads for ecommerce is paid advertising that puts an online store’s products in Shopping ads, Performance Max and search results, built from a Merchant Center product feed. Good At Marketing provides the management from Boynton Beach, Florida, at $600 to $1,000 a month, plus the click spend you pay Google, as listed on the pricing page.
By Donnie Strompf. Updated October 2026.
This page explains the product feed, the campaign options, the ROAS arithmetic and how to compare agencies. Our ecommerce marketing page covers all five channels we offer stores, and the Google Ads management page covers the service for every industry.
How does a product feed become a Shopping ad?
Google Ads Help says Shopping ads use your Merchant Center product data and not keywords to decide how and where to show, and that, unlike text-only ads, they display a product photo, a title and a price (Google Ads Help, About Shopping ads, read October 19, 2026). So the product information in Merchant Center decides what a Shopping ad shows. In our view, an agency that opens the Google Ads screen before it has looked at the feed is starting in the wrong place.
Merchant Center Help lists several ways to add product data: automatic collection from schema.org markup on your product pages, a connection to an ecommerce platform such as Shopify, a file, a Google Sheets template, entry one product at a time, or the Merchant API. The page says you can combine methods (Google Merchant Center Help, How to upload your products to Merchant Center, read October 19, 2026).
Each upload creates a data source, and an account can hold several (Google Merchant Center Help, Manage your data sources, read October 19, 2026). If the same product arrives through more than one source, Merchant Center treats it as belonging to the source that was updated most recently. The page also separates primary sources from supplemental ones, which feed into rules set on a primary source.
Check how the sources are set up. Which one is primary, and who has permission to change each of the others? A forgotten spreadsheet and a platform connection that both list a product can disagree, and it may not be obvious to anyone which one the ads are using.
The same Help center describes a Needs attention tab on the Products page. It lists account-level and product-level issues, can be filtered and downloaded, and rates each product’s click potential as high, medium or low (Google Merchant Center Help, The Needs attention tab, read October 19, 2026). Ask the agency to show you that list at the start of an engagement and again each month.
How do Shopping and Performance Max campaigns differ?
Google Ads Help says you manage Shopping ads with either Shopping campaigns or Performance Max campaigns (Google Ads Help, About Shopping ads, read October 19, 2026). Search campaigns run on keywords, and the same page says a Shopping ad and a text ad can appear together for one search.
The two Shopping routes differ in how you pay as well. Google’s page says Shopping campaigns charge by cost per click, while Performance Max charges for the performance of the campaign, such as clicks or CPM. It also says Shopping campaigns currently have no additional creative assets, and Performance Max reaches more of Google’s inventory (Google Ads Help, About Shopping ads, read October 19, 2026).
For a Performance Max campaign with products, Google’s setup page says the Google Ads account must be linked to Merchant Center, that you cannot change the Merchant Center account after the campaign is created, and that the business name should match your verified legal name or domain name to avoid disapproval (Google Ads Help, Create a Performance Max campaign with products from Merchant Center, read October 19, 2026). That page carries no date. Link the right account first.
Google’s Shopping ads page adds that Google may use content from your landing page and feed, plus AI-generated content, to enrich ads, and that you can opt out. Ask the agency whether that setting is on for your account and what it changes.
What return on ad spend does a store need to break even?
Google defines target ROAS as the average conversion value, such as revenue, that you want for each dollar spent on ads. Its example is $5 in sales for $1 in ad spend, which is a 500% target (Google Ads Help, About Target ROAS bidding, read October 19, 2026). ROAS is sales divided by ad spend.
The break-even point comes from your margin. The figures below are invented, so replace them with your own.
- A product sells for $80, and it costs $48 to source and ship, which leaves $32, a 40% margin.
- Break-even ROAS is the price divided by the profit per sale: $80 divided by $32 is 2.5, or 250%. Below that, each ad dollar returns less margin than it cost.
- At a 400% target, $3,000 of ad spend brings $12,000 of sales and $4,800 of margin. That leaves $1,800 after the ads, and $800 to $1,200 after a management fee of $600 to $1,000, before any other cost.
The table runs the same sum at three margins on the $80 sale. The arithmetic is ours and the margins are invented, so Google’s page supplies only the ROAS definition.
| Margin on an $80 sale | Profit per sale | Break-even ROAS | Ad spend that breaks even on $3,000 of sales |
|---|---|---|---|
| 15% | $12 | 667% | $450 |
| 40% | $32 | 250% | $1,200 |
| 60% | $48 | 167% | $1,800 |
Margin varies by product, so break-even ROAS does too. A store whose margins range from 15% to 60% cannot give every product the same target. Ask the agency how it plans to separate the products that can carry a high ad cost from those that cannot.
Google’s Target ROAS page also says you must set values for the conversions you track before you apply the strategy. Its page on transaction-specific values says you can pass the value of each purchase, with its currency, to the conversion tag, which suits items at different prices (Google Ads Help, Track transaction-specific conversion values, read October 19, 2026).
The Target ROAS page gives revenue as an example of conversion value, and neither page says which basis you must use. Choose the one your break-even sum uses, and write it down so the report and your accountant agree. Our budget guide does the same sum for businesses that sell by lead, and the conversion tracking guide covers setup.
What should a store read in the monthly report?
A monthly report for a store needs more than clicks. These named measures tie ads to orders:
- Conversions and conversion value. Orders counted in the account, and the total value passed with them. Compare both with the orders and sales in your store platform.
- Ad spend and ROAS. Spend as billed by Google, and conversion value divided by that spend, shown next to your break-even figure.
- New and returning customers. The new-customer bidding option, covered in the FAQ below, separates the two, and a store with a large repeat base should look at them apart.
- Product issues. The count and type of items on the Needs attention list, and which of them had sales.
- Fee and ad spend as separate lines. The all-in cost is the two added together.
Ask which of these measures the report covers, and compare its purchase data with the orders recorded in your ecommerce platform. If they differ, find out why before anyone changes a bid.
What should a Google Ads plan for a store cover?
Our fee is $600 to $1,000 a month, listed on the pricing page, with ad spend billed by Google on its own (prices reviewed October 2026). Where a store lands depends on the number of campaigns, the state of the feed and how much conversion tracking needs repair. The fee models agencies use are compared in our Google Ads cost guide, and proposals are easiest to judge line by line.
A plan for a store should say in writing which of these it covers:
- Who owns the Merchant Center account and which data sources feed it.
- How purchase value reaches Google Ads, and on what basis.
- Which products are advertised, which are held back, and why.
- Which campaign types run, and what each is expected to do.
- A plan for the weeks when sales spike or stock runs low.
- A report that shows ROAS beside your break-even figure.
A store that also wants organic search, AI visibility and email can look at the national ecommerce program, published at $8,000 to $14,000 a month on the pricing page, with ad spend separate. How ChatGPT shows products is covered on our ecommerce marketing page.
For organic search on its own, see SEO for ecommerce.
How do a store’s margins and catalog change the plan?
The same account is built differently for three kinds of store, and this page quotes no result for any of them.
Single-brand stores with healthy margins. A brand that makes or sources its own goods keeps a wider gap between price and cost, so its break-even ROAS tends to sit lower. Shopping ads show the product photo and price before the click, which suits a catalog that looks different from its neighbors. The work is to keep price and availability in the feed in step with the site.
Resellers who carry other makers’ products. The same item may be advertised by several sellers, which can squeeze margins and raise the break-even ROAS. In our view, price and delivery terms matter more here. Merchant Center Help lists shipping and return policy information among the setup steps for free listings (Google Merchant Center Help, Free listings for products, read October 19, 2026). A reseller should know its margin for each product before it sets a target.
Seasonal and made-to-order sellers. Sales arrive in bursts, and a product that cannot ship on time should not be advertised. Availability is one of the required attributes in Google’s free listings requirements. Ask how the plan handles the weeks before a peak, and who changes the feed when stock runs out.
A store with no purchase tracking, a checkout it has not settled or a catalog it cannot ship should fix those first. Paid clicks pay for traffic, and cannot repair a checkout that fails. We meet clients by Google Meet or Zoom, so a store can be based anywhere. Our Palm Beach County hub lists the nearby cities we serve.
FAQ
What does Google Ads cost an online store in total each month?
Add our management fee of $600 to $1,000 to the ad spend you choose, which Google bills separately. Set aside $3,000 for clicks and the month comes to $3,600 to $4,000 with the fee. No fee here promises a return on that spend. The range for the wider program is on the same page.
Do I have to pay to appear in Google Shopping?
Not for every placement. Merchant Center Help says products can appear at no cost on Google Search and other Google surfaces, alongside any paid ads, and that free listing status does not guarantee products will be shown. Shopping ads are the paid placements, and they run in addition to free listings.
Can I stop ads on products that do not sell?
Merchant Center has an optional excluded destination attribute that keeps a product off chosen marketing methods. Submitting the value Shopping_ads for a product prevents it from appearing in Shopping ads, and Google says the exclusion wins if it conflicts with an included destination. Ask your agency who edits that attribute and where it is recorded.
Can Google Ads favor first-time buyers?
Google Ads Help describes customer lifecycle goals that can bid higher for new customers or bid only for new customers, in four campaign types that include Performance Max and Shopping. Lists need at least 100 active members. Google builds a list from up to 540 days of tracked purchases, and recommends Customer Match lists for the most accurate detection.
Why would my products stop showing in ads?
One cause is age. Merchant Center Help says a product expires 30 days after its last refresh, or on its expiration date if that comes sooner. Re-submitting a data source, scheduled uploads and structured data Google can validate all refresh it. Ask your agency how often the feed refreshes.
Should bids change for a one-week sale?
Google Ads Help calls seasonality adjustments an advanced tool that tells Smart Bidding to expect a shift in conversion rate, and says to use them only for major changes. They suit events of 1 to 7 days, and stretches beyond 14 days may go less well. No reversal is needed once the promotion ends.
Next step
The free AI-visibility audit comes first, then a 15-minute call to see whether Google Ads suits your margins.