Everyone's talking about the latest AI model launches and whether ChatGPT ads are the next big thing. Most people are missing something less glamorous: this week's most important news is about who owns the shopping basket. The second most important is about whether you can trust your own numbers. Neither makes the headlines, and both affect what ends up in your bank account.
Here's what I think matters for your online shop this week.
Google Wants to Hold Your Customers' Shopping Basket
Google has launched something called Universal Cart. It's now live in the US across Search and the Gemini app, and Google is pitching it squarely at holiday shopping.
In plain terms, it's a single shopping basket that sits inside Google's own products. A shopper can collect items they've found through Search or while chatting with Gemini, all in one place that Google controls. They don't have to keep track of half a dozen open tabs across different shops.
Why should you care? Think about how buying works today. Someone searches, clicks your Shopping ad, lands on your site and adds to basket on your checkout. You own that moment. With Universal Cart, the basket starts with Google instead. Your products still need to be found and chosen, but the comparison and the "shall I buy this?" decision increasingly happen on Google's turf rather than yours.
It's US-only for now, but Google's shopping features have a habit of crossing the Atlantic. If you sell online in the UK, now is the time to get your house in order:
- Your product feed is your shop window. Titles, images, prices and stock levels need to be accurate and compelling, because that's what shoppers will see in the basket.
- Price competitiveness gets more visible. If shoppers can line your products up against a competitor's in one place, any price gap will stand out more.
- Delivery and returns details matter. When the basket isn't on your site, the information in your feed has to do the persuading.
I'll be watching this closely as it develops. If it reaches the UK, Merchant Center hygiene stops being a nice-to-have.
Your ROAS Went Up. Are You Sure?
This one doesn't sound exciting, but please don't skip it.
PPC Hero published a useful piece on how conversion tracking errors can make your return on ad spend (ROAS) look better than it really is. They point to three main culprits: duplicate conversions, where one sale gets counted twice; static conversion values, where every sale is recorded at the same fixed amount whatever the basket was actually worth; and general tracking set-up errors.
What does that mean for you? If Google thinks you're making £8 for every £1 spent when you're actually making £4, its automated bidding will happily spend more of your money chasing results that don't exist. Smart bidding is only as clever as the data you give it.
It's something I keep coming back to. Before you celebrate a jump in ROAS, compare it with what actually landed in your Shopify or WooCommerce orders. If Google Ads says you had 200 sales and your shop says 120, something's wrong, and it's worth sorting out before you increase budgets for Christmas.
ChatGPT Ads: Worth a Punt or Worth Waiting?
ChatGPT ads are getting a lot of attention, and WordStream has set out the pros, the cons, the costs and who should consider them.
I get asked about this a lot, so here's my honest take. Being early on a new advertising platform can mean cheaper clicks and less competition. It can also mean immature reporting, limited targeting and spending money while the platform works out what it's doing.
For most e-commerce businesses, the question isn't really "should I be on ChatGPT?" It's "is my Google Ads account working as hard as it possibly can?" If the answer is no, fix that first. If it's running well and you have budget you can afford to experiment with, a small, ring-fenced test makes sense. Just don't move money away from proven channels on the strength of hype.
AI Search Is Harder to Predict Than You'd Think
A research paper tested whether Google results or OpenAI's API could be used as a stand-in for working out which sources ChatGPT cites. The answer was only partly. They matched the websites ChatGPT cited more often than the exact pages.
Why does this matter for an online shop? Plenty of tools now promise to tell you how visible your brand is in AI search. This research suggests that kind of measurement is rough at best. You might be able to tell whether your site is in the mix, but not which product page or guide is doing the work.
My advice: build a strong, trustworthy site overall rather than chasing one page into AI answers. Clear product information, genuine reviews and helpful buying guides help you whether the shopper arrives through Google, Gemini or ChatGPT.
Tracking Tools Under Fire and Another Gemini Model Lands
Search Engine Roundtable's weekly recap had two stories worth flagging. First, Google appears to be feeding third-party tracking tools fake data and putting up paywalls, which is causing havoc with keyword rank tracking. Second, Google has launched Gemini 4 Argon, and it's already powering AI Mode.
The tracking story is the one to note. If you, or whoever handles your SEO, rely on third-party tools to see where you rank, treat those reports with more caution for now. Your first-party data, meaning Search Console, Google Ads and your own sales figures, is the most reliable picture you've got.
As for Gemini 4 Argon, each new model changes how AI Mode understands and answers shopping queries. Combine that with Universal Cart and you can see where this is going: Google wants the entire journey, from question to basket, to happen inside its own walls.
What I'm Watching
There's a clear thread running through all of this. Google is pulling more of the shopping journey into its own products, and at the same time it's getting harder to measure what's happening from the outside.
That puts more weight on the things you can control. Your product feed has to be in excellent shape, because that's what Google will show in its baskets and AI answers. Your conversion tracking has to be honest, because automated bidding will spend on whatever you tell it is working. And your own sales data should be the final word on whether advertising is paying its way.
Over the coming weeks I'll be watching for any sign of Universal Cart reaching the UK, how AI Mode behaves on product searches as the holiday season picks up, and whether ChatGPT ads mature into something e-commerce businesses can measure properly. With Christmas on the way, this is a good time to check that your tracking adds up and your feed is in shape.