Both start with your Merchant Center feed
Both campaign types sell the same thing: your products, with a photo, title and price. Google says Shopping ads use your Merchant Center product data, not keywords, to decide where to show. So the first job is the same either way. Add your products to Merchant Center and link it to your Google Ads account. Then make the feed good. Google asks for rich descriptions, images of at least 500 x 500 pixels, and prices and stock that stay up to date. A kurti listed at ₹799 in the feed must cost ₹799 on your site too.
What Standard Shopping gives you
Standard Shopping is the hands-on option. You split your catalogue into product groups and set a bid for each group. You can raise the bid on your best seller and exclude a group that never sells. Negative keywords stop your ads showing for searches you do not want. You pay per click. The ads show on the Shopping tab, Google Search, Google Images and Search Partner sites. You see what works, product by product, and you decide what changes.
What Performance Max gives you
Performance Max is the automated option. Google calls it a goal-based campaign that reaches all Google Ads inventory from one campaign. That means YouTube, Display, Search, Discover, Gmail and Maps as well as Shopping. You give it a goal, such as more online sales, plus asset groups of images, text, logos and videos. Audience signals help it learn faster. In return, you give up most of the levers. Google decides where each rupee goes.
The two campaigns side by side
| Point | Standard Shopping | Performance Max |
|---|---|---|
| Where ads show | Shopping tab, Search, Images and Search Partner sites | All Google Ads inventory, including YouTube, Display, Gmail and Maps |
| How you steer it | Product groups, bids per group, negative keywords, campaign priority | A goal, asset groups and audience signals |
| How you pay | Cost per click | For performance, for example clicks or CPM |
| Best when | You want control and have few sales so far | You track sales well and want reach across every channel |
The data Performance Max needs
Performance Max learns from your sales, so it needs to see them. Google suggests a strong Google tag across your whole website, with conversion tracking set up in Google Ads. Its tips recommend Maximise conversion value bidding. If you set a target ROAS, Google says to base it on your product costs and a buyer's lifetime value. Then be patient. The Merchant Center guide suggests at least 14 days before you change settings. The Google Ads tips suggest running it for at least six weeks. If your tracking misses COD orders or counts returns as sales, the AI learns from the wrong numbers.
When to start with Standard Shopping
Start with Standard Shopping if your store is new, your budget is small or your tracking is not yet solid. With only a few orders a week, Performance Max has little to learn from. Standard Shopping lets you learn by hand instead. You see which products get clicks at what cost, and you cut the ones that waste money. Once sales flow and your tracking is clean, test Performance Max beside it. Google even offers an experiment that compares a Standard Shopping campaign against a Performance Max one.
Running both at once
You can keep both running. When both could serve an ad for the same product, Google says it picks the campaign with the highest Ad Rank. That stops your own campaigns bidding against each other. Watch cost per delivered order in both, not clicks. Whichever campaign you choose, check Google's numbers against your real orders. On The Storemate, the sales report shows your revenue trend and order status, so you can see which weeks the ads actually paid.