Performance Max vs Standard Shopping: The Ecommerce Verdict (2026)

An online store selling on Google has two main campaign types to choose from: Performance Max (PMax) and Standard Shopping. Both build product ads from your Google Merchant Center feed, so the usual question is whether to run PMax only, Standard Shopping only, or both.

About 70% of ecommerce accounts run Performance Max with no Standard Shopping, and about 30% run both. In the accounts running both, Performance Max returned a ROAS of 10.5 and Standard Shopping 6.1. Standard Shopping often covered fewer products.

This post compares the two campaign types, shows the data, and explains when Standard Shopping is worth keeping. For the full set-up, see our complete Performance Max guide.

What is the difference between Performance Max and Standard Shopping?

Both campaign types build product ads from the feed you submit to Google Merchant Center. They differ in where the ads appear, how bids are set and what you can see in reporting.

For the feed and campaign settings, see our complete guide to Google Shopping Ads. For how Smart Bidding compares with manual bids, see our guide to Google Ads bidding strategies.

Which campaign serves first when both target the same products?

Google's onboarding guide for Shopping ads (checked 14 October 2026) says an account can run a Standard Shopping campaign and a Performance Max campaign for the same products. If the two also share locations, languages, ad schedule and other targeting, Ad Rank decides which campaign serves the ad. Google's earlier guidance, as widely reported, gave Performance Max precedence, so older articles on this topic may still describe that rule.

The Low, Medium and High priority setting applies between Standard Shopping campaigns. Google's campaign priority article says the highest-priority campaign bids on a shared product. If its budget runs out, the next priority down bids. When priorities are equal, the campaign with the higher bid enters the auction.

Account E, month by month

Account E runs both campaign types. Standard Shopping served in every month from October 2025 to September 2026. Its share of the two campaigns' combined impressions ranged from 4.4% to 37.6%. The three highest months were October to December 2025.

We also checked the July to September data product by product. In every account running both except Account H, at least 92% of Standard Shopping's product impressions were on products that Performance Max also served in the same period. For Account E it was over 99%.

This does not prove the two met in the same auction, because targeting can differ and we did not check auctions one by one. The pattern is consistent with Google's current Ad Rank wording.

Can you run Performance Max and Standard Shopping at the same time?

Yes. About 30% of ecommerce accounts run both.

Performance Max had the higher ROAS in every account except Account A. In Accounts F and H, Standard Shopping took under 2% of spend and recorded no conversions in the three months. Pooled across these accounts, Performance Max returned a ROAS of 10.5 against 6.1 for Standard Shopping. Its cost per conversion was also lower.

Treat the ROAS comparison with care. In more than half of these accounts, Standard Shopping served fewer products than Performance Max did, so the two campaigns were not selling an identical range.

When should you keep Standard Shopping?

The number of accounts running Standard Shopping more than halved between the 12 months to September 2026 and July to September 2026. We would still recommend keeping a Standard Shopping campaign in these cases:

• Product-level bid control. Standard Shopping lets you bid by product group, use Manual CPC and read the full search terms report.
• A sale, clearance line or time-limited offer needs its own budget. A separate campaign lets you set the budget and bids for that group of products yourself.
• Testing before a switch. Google Ads has a Standard Shopping vs Performance Max experiment that splits traffic between an existing Standard Shopping campaign and a Performance Max campaign, so you can compare them over the same dates.

How should you split budget between them?

In the accounts running both, Standard Shopping took a median 6.8% of the two campaigns' spend. The lowest was 0.8% and the highest 21.1%.

We recommend putting the main budget on Performance Max and giving Standard Shopping one of the jobs listed above, with its own budget. Each month, compare the ROAS and cost per conversion of the two campaigns on the same conversion definition before moving budget.

How does reporting differ?

Standard Shopping has always had a full search terms report and product group data. At launch, Performance Max had no search terms report. Google has added reporting since then. Search themes arrived in October 2023 (see "Optimize Performance Max with search themes for improved traffic"). In August 2025 Google announced search terms reporting for all Performance Max campaigns and campaign-level negative keyword lists. The channel performance report breaks Performance Max results down by channel, such as Search, YouTube and Maps, and can be segmented by video or product feed ad formats.

We split the July to September Performance Max data by network through the API. By account, a median 92% of Performance Max conversion value came from the Google Search network. The lowest account was 59% and the highest 100%. More than half were at 90% or above. The API's Search network covers both Shopping ads and text ads on Google Search. We could not separate the two in this pull. YouTube, Display, Discover and Gmail together made up a small share in most of them.

Does this apply to lead generation?

No. Every figure above comes from ecommerce accounts, where a conversion is an online purchase. In lead-generation accounts we have repeatedly seen Performance Max bring in a high volume of enquiries, most of them low quality. For lead-gen we recommend keeping the budget on Search. The figures behind this are in the ecommerce and lead-gen budget section of "Performance Max Campaign: Boost Your Google Ads with Ease".

How we got these numbers

• Pulled on 14 October 2026 through the Google Ads API using read-only queries. No account settings were changed.
• An ecommerce account here is one where a Performance Max or Standard Shopping campaign linked to Merchant Center had impressions between 1 July and 30 September 2026. A few more accounts had a Merchant Center link but are not online stores or do not track online purchases as conversions. We left them out.
• Accounts are labelled A to H. Names and categories are not shown.
• ROAS is the conversion value each account recorded, divided by spend. Pooled figures come only from the accounts running both campaign types, all billed in Hong Kong dollars.
• Account E's monthly figures cover October 2025 to September 2026. Product overlap is counted by product item ID for July to September 2026.

FAQ

Is Performance Max better than Standard Shopping for ecommerce? In all but one of the accounts that ran both, Performance Max recorded the higher ROAS, though Standard Shopping often covered fewer products. Pooled across those accounts, ROAS was 10.5 for Performance Max and 6.1 for Standard Shopping. About 70% of ecommerce accounts run Performance Max only.

If Performance Max and Standard Shopping target the same products, which one serves? Google's current help page says Ad Rank decides when the two campaigns share products and overlapping targeting such as locations and languages. In accounts running both, Standard Shopping kept getting impressions on products that Performance Max also served.

Should I stop running Standard Shopping completely? Not necessarily. Keep it if you need product-level bid control, a separate budget for a sale or clearance line, or brand costs kept apart. Let Performance Max carry the main budget.

How much budget should Standard Shopping get? In accounts that run both, Standard Shopping took a median 6.8% of the two campaigns' spend, with a range of 0.8% to 21.1%. We recommend giving it a defined job and its own budget, then reviewing ROAS and cost per conversion monthly.

Where do Performance Max conversions come from in ecommerce accounts? Mostly Google Search. A median 92% of Performance Max conversion value came from the Google Search network, which includes Shopping ads and text ads on Search.