what changed in mid-May
Something shifted in Google Shopping around May 13. The top three sponsored Shopping positions — the slots that appear before the main carousel — now show a snippet of product description text alongside the image, title, and price.
This isn't a small UI tweak. The description field, which most Merchant Center users treat as a backend data entry task, is now front-of-page ad creative for your highest-visibility Shopping placements.
The source is your Merchant Center feed description field, pulled verbatim. Google takes the first 200–300 characters with no AI rewriting and no summarization. It shows exactly what you wrote — or whatever your feed tool auto-generated three years ago.
why most merchants haven't caught this
Shopping campaigns don't have a headline-description structure the way Search ads do. For years, what showed in Shopping was image, product name, price, and store name. Descriptions were background data — useful for query matching, invisible to shoppers.
That assumption is wrong now, at least for the top three sponsored slots.
Most teams writing Merchant Center descriptions were optimizing for keyword coverage, not conversion copy. The default pattern is: "[Brand] [Product Name] is a [product type] featuring [list of attributes]..." That reads like a spec sheet. It fills the field. It doesn't close a sale.
The gap between merchants who wrote real copy and those who auto-filled descriptions is visible in the SERP now. Shoppers can see it. The algorithm notices too — expected CTR is one of three components of ad rank, alongside bid and landing page relevance.
what the early numbers say
Data from merchants who caught this change early:
An electronics retailer rewrote descriptions for 500 SKUs, leading with benefits rather than feature lists. CTR on top Shopping placements rose 22%. ROAS improved 18% within two weeks.
An apparel merchant using short, scannable phrases on mobile instead of one dense sentence reported 28% CTR improvement on mobile placements specifically.
Merchants who haven't touched their descriptions are reporting CTR losses relative to competitors who moved. The variance for top positions runs 15–25% depending on category and description quality.
The mechanism isn't just visibility. Higher expected CTR improves ad rank, which lowers your effective CPC. Better description copy means stronger position without raising bids.
the 200-character problem
Google's display currently renders around 200 characters on desktop, shorter on mobile. It truncates wherever the character limit falls — no intelligent breaking at a sentence or phrase boundary.
Your description needs to front-load. The most important information belongs in the first 150 characters. What comes after may never be read.
Four things worth packing into the first 150 characters:
- The primary differentiator for this specific product (not the category, the actual thing that earns the click over the listing next to it)
- The answer to the most common purchase objection in your category — material, size range, compatibility, warranty length
- Nothing that repeats the product title, which is already visible above it
- A phrase that reads at mobile scan speed, not a keyword string
If you sell in a category where shoppers compare two or three products side by side, the description is now a tie-breaker. Treat it like one.
PMax, feed quality, and where this is heading
This description change is the most direct version of a pattern Google has been building toward for two years: the Merchant Center feed is becoming the creative input, not just the eligibility signal.
At Google Marketing Live on May 20, AI Max for Shopping was announced — using Merchant Center feed data to generate dynamic ads for conversational queries. Conversational Attributes (product_faq, product_use_cases) were also launched, letting feed items answer AI Mode questions directly.
The description field showing in Shopping ad positions is simpler than any of that. Google didn't need to build anything new. It surfaced text that was already there. The question is whether that text does any work.
If you're running PMax, this affects asset quality scores. Thin or weak descriptions weaken the overall creative pool available to the campaign. PMax can't generate strong ad variations from weak source material — it can only work with what you give it.
The description field was easy to ignore when it sat in the backend. Right now it's in your live ads.
If you want to know where else your Shopping and PMax setup is leaving performance behind, the free Gromerce audit tool takes three minutes to surface the biggest gaps.
Your feed is your creative brief now. Write it like one.
Sources: ALM Corp, ZATO PPC Marketing, WordStream, Search Engine Land, May 2026
