Google Shopping: the feed decides, not the campaign
Google Shopping ads are not built from keywords. Google generates them from the product data you send to Merchant Center, which it uses to match your products to the right searches. The performance lever is therefore the feed, and it belongs to whoever manages the catalogue, not whoever manages the campaigns.
- Google documents three levels of attributes: required, conditional and optional. A missing required attribute keeps the product out of Shopping ads as well as free listings.
- Five causes of disapproval recur most often: incorrect product category, wrong identifier, missing variant attributes, low-quality images, and a mismatch between the feed and the site.
- A price mismatch between your feed and your product page is enough to have the item removed. That is a synchronization problem, not an advertising one.
- Google asks you to submit data of the same quality you would show a customer. It is the most useful rule in the document.
- The budget consequence: the person who decides performance is the one who owns the catalogue.
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Product feed
A product feed is the structured file, sent to Google Merchant Center, that describes each item in a catalogue through a series of attributes: title, description, price, availability, identifiers, category, images. Google uses it to match products to the corresponding searches and to generate both Shopping ads and free listings. Its quality governs each product's eligibility, independent of the budget committed to the campaigns.
The reversal no one explains
A management team used to search advertising arrives with a precise mental model: you pick keywords, you set a bid, you write an ad. On Shopping, that model does not apply, and ignoring it commits the budget in the wrong place for quarters at a time.
Google states it in its documentation: it uses the product data sent to Merchant Center to match your items to the right searches. You do not choose the queries, you describe your products, and the engine makes the match. The consequence is direct: the quality of the title, the category and the attributes matters more than the tuning of a campaign.
Google also notes that providing accurate, correctly formatted data is essential to the success of your ads as well as your free listings, and warns that incorrect, inaccurate or missing information leads to disapprovals, reduced eligibility or incorrect display. In other words, the first line of useful spend is not the bid: it is a clean catalogue.
The bid did change nature on August 17, 2026, though. In a Shopping campaign limited by its budget, the target return is no longer a floor the system beats: it is the one it converges toward.
What to settle before you raise a Shopping budget
Raising the budget on a campaign where part of the catalogue is disapproved amounts to paying more to sell the same items. It is the most common mistake on this channel, and it is invisible in the campaign report.
- How many of our products are currently disapproved or of reduced eligibility, and since when?
- Are our prices and availability synchronized between the site and the feed, and how often?
- Who, on our side, is accountable for the feed: marketing, sales, or whoever owns the catalogue?
- What margin do the products the campaign actually pushes carry?
- If the return stays below our threshold after the feed is fixed, what do we cut?
The useful answer starts with the number of disapproved products before it talks about bids. A weak answer proposes raising the budget, talks about keywords on a channel that uses none, or treats the feed as a technical setup done once.
Whether your Shopping budget is held back by the feed rather than the bid is legible in your product diagnostics. A 90-minute consultation settles it, with a written summary your team can act on.
The documented causes of disapproval
Google names the most common problems itself. Knowing them saves paying for a diagnostic just to rediscover them.
| Cause | Effect | Who fixes it |
|---|---|---|
| Incorrect product category | Product matched to the wrong searches | Catalogue |
| Wrong or missing product identifier | Disapproval or reduced eligibility | Catalogue |
| Missing variant attributes | Sizes and colours confused with one another | Catalogue |
| Low-quality images | Item disapproval | Visual production |
| Mismatch between the feed and the site | Product removal | Commerce system |
The last row is the most costly in practice. A price changed on the site but not yet propagated to the feed, or the reverse, is enough to have an item removed. On a catalogue that changes often, this is not an incident: it is a process to maintain. The broader logic of large catalogues is covered in the number of URLs a catalog generates, and the structure of filtered URLs in faceted navigation.
Google asks you to submit data of the same quality you would show a customer. That sentence settles most internal debates about product titles: a title stuffed with keywords no buyer would read aloud fails the test, even if it passes technical validation. The criterion is commercial before it is technical.
Who is accountable
This is the least comfortable conclusion on the subject, and the one that changes results the most. In most companies, the Shopping budget is handed to marketing, while the lever belongs to the person who owns the catalogue.
As long as that accountability is not named, the fixes drag on. Marketing sees disapprovals, forwards them, and waits. The catalogue team does not feel the urgency, because the product still sells in store. Meanwhile, the ad budget drains onto the eligible portion of the catalogue, often not the one carrying the best margin.
What stays in-house: margin by product line, the list of products the company wants to push, the synchronization of prices and stock, and naming the person accountable for the feed. That last point is an organizational decision, not a deliverable. What gets delegated: the structure of the feed, fixing the attributes, reworking the titles, monitoring the diagnostics, segmenting campaigns by margin and reading the results. A company that names a feed owner clears more disapprovals in a month than in a year of email reminders.
The break-even calculation applies here as elsewhere, and it is detailed in the move from reported ROAS to actual profit. Sales tracking is covered in what breaks a conversion setup, and account structure in structure, exclude, measure.
This channel is compared to the others in choosing and concentrating advertising budgets.
Bringing ad spend back to a defensible return is at the heart of the Optimize the profitability of your digital campaigns goal.
Already running a marketing team? See how we plug in as reinforcement on Google Ads campaign management.
Frequently asked questions about Google Shopping
Do you choose keywords on Shopping?
No. Google states that it uses the product data sent to Merchant Center to match your items to the corresponding searches. You describe your products, the engine makes the match. The performance lever is therefore the quality of the feed, not the selection of queries.
Why are some of my products disapproved?
Google names the most frequent causes: incorrect product category, wrong identifier, missing variant attributes, low-quality images, and contradictory data between the feed and the site. A single missing required attribute is enough to keep the product out of Shopping ads as well as free listings.
How do you write a good product title?
Google asks you to submit data of the same quality you would show a customer. A readable title that names the brand, the product and its distinctive attributes passes this test. A title stuffed with keywords no buyer would read aloud fails it, even if it passes technical validation.
Who should own the feed?
The person who owns the catalogue, not the one who manages the campaigns. As long as that accountability is not named, disapprovals pile up while the budget drains onto the eligible portion of the catalogue, often not the one carrying the best margin.
- Google, Merchant Center Help, Product data specification, official documentation, accessed July 2026.
- Google Ads Help, Product data specification, on the frequent causes of disapproval, accessed July 2026.
Gabriel almost always takes your first call and carries out your audit. He builds the strategy starting from your growth goal: where to put your budget, which market to test and how to connect each lead to a real sale in your CRM. He mainly leads engagements for three goals: Optimize the profitability of your digital campaigns, Develop a new market, and Generate demand and growth. With Geneviève, he also works on organic search (SEO), AI visibility (GEO) and conversion rate optimization (CRO). The sales a Google Ads or Meta Ads campaign brings in depend on the page that receives the click. He writes mainly about marketing strategy, paid advertising and measurement.
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