Standard Shopping vs Performance Max

Google's page on Shopping ads says retailers can promote products using Performance Max with a Google Merchant Center feed, or with Shopping campaigns. Shopping ads show a product photo, title, price, store name and more, so people see the product before they click.

• Standard Shopping runs Shopping ads from your product feed, with bids and structure you control.
• Performance Max uses the same feed but can show ads across all of Google's inventory, with Google's AI choosing placements and bids toward your conversion goals, as Google describes in About Performance Max campaigns.

Google's page on how Performance Max interacts with other campaigns says that when several campaigns could serve for the same impression, Google Ads generally favors the one with the highest Ad Rank.

Within Standard Shopping itself, Google offers campaign priority. It matters when the same product, for the same country, sits in more than one Shopping campaign. Campaigns start at Low priority, and you can set Medium or High. Google says the highest-priority campaign bids, even if a lower-priority campaign has a higher bid. If it runs out of budget, the lower-priority campaign bids. If priorities are equal, the higher bid is used.

Google offers a Standard Shopping vs Performance Max experiment. It compares an existing Standard Shopping campaign against an existing or new Performance Max campaign with similar settings. That is a much better answer than any forum opinion, because it uses your products, prices and margins.

Standard Shopping tends to fit when:

• you want product-level control and clear search term data
• your conversion tracking is new or unreliable
• you sell a small catalog with very different margins

Performance Max tends to fit when:

• conversion tracking is solid, with values that reflect profit
• you have strong images and video
• you want reach on YouTube, Discover and Gmail as well as Shopping

Many retailers run both, with clear rules about which products go where.

• Moving everything at once. Test with an experiment first.
• Judging after a few days. Give both campaigns enough conversions to compare.
• Ignoring feed quality. Both campaigns depend on the same product data. A weak feed hurts both.

Can I run both campaigns on the same products? Yes. Google decides which serves for each impression, generally by Ad Rank.

Does campaign priority work between Standard Shopping and Performance Max? Google's campaign priority setting is for Shopping campaigns that promote the same product.

Which reports more detail? Standard Shopping gives more direct control and reporting. Performance Max offers channel performance and asset reporting.

Standard Shopping vs Performance Max is not a fight to settle in a forum. Fix the feed and conversion values, then let Google's experiment tool show which one earns more for your products.