The tradeoffs between using Performance Max (PMax) and Standard Shopping have changed. The question is not which campaign type is better. The question today is which campaign type fits your business goal, product mix, budget, conversion data, and need for control.
PMax versus Standard Shopping isn’t necessarily an either/or decision at the account level. It is often a product-level decision. Run both when appropriate, but deliberately assign SKUs according to their economics and advertising role rather than casually allowing the same products to populate both campaigns.
PMax allows eCommerce advertisers to expand their advertising reach across the entire inventory of Google’s web properties and channels, while Standard Shopping serves “Google Shopping Ads” on search engine result pages (SERPs). Google Shopping facilitates more control over product visibility, search terms, bids, campaign serving priority, and negative keyword targeting.
Should We Run Both PMax and Shopping?
In some accounts, it can make sense to run both, but rarely makes sense to run the same SKUs in PMax and Shopping campaigns.
When the same SKUs are eligible in both PMax and Standard Shopping, Google uses Ad Rank to determine which campaign serves. This can cause traffic and conversion value to shift between the campaigns over time, making campaign-level performance appear erratic even when overall account demand hasn’t changed. It can also make it harder to interpret bidding performance because neither campaign has exclusive ownership of the products.
We have seen this in many accounts that come in. Often, auto-recommendations have urged the advertiser to “include all products” in the campaign and the result is both a Shopping and a PMax campaign are trying to bid in the same auction. The revenue then shifts back and forth between Shopping and PMax, making the individual campaigns performance erratic.
One month PMax may book $16k in sales, the next month $4k depending upon what’s going on in the auctions. This confuses the automated bidding because the advertisers campaigns are competing with themselves, driving up CPCs, before the auction slots are decided.
The solution is some decision making. Which products make sense to advertise in PMax? And which in Shopping? Outside of controlled testing or a deliberate auction strategy, we generally see little benefit in maintaining substantial SKU overlap.
Often the best strategy is to run the best performers in PMax, and the rest in Shopping. A good partition is to run the best sellers and higher-margin SKUs in PMax, and the rest of the products in Shopping. Shopping has mechanisms that provide more precise keyword-level control, so wasted spend can be whittled down more effectively. PMax is best reserved for products with aggressive growth potential, while Shopping can advertise everything else.
A recent client was seeing wild fluctuations month to month as revenue shifted back and forth between PMax and Shopping. We ended up advertising their 400 strongest products in PMax, and the other 5,000 in Shopping campaigns.
Why Choose Single-Channel vs Multi-Channel Ads?
The first thing to think about is, what kind of product are you selling? If it’s the type of product that doesn’t require much research or consideration, Google Shopping delivers strong-performing low-funnel search ads on search engine result pages, usually at a lower cost per click than a traditional search ad. It’s database-driven, so is designed to serve ads for a large array of products.
PMax adds the ability to reach potential customers beyond traditional Shopping inventory, including through YouTube, Display, Discover, Gmail, Maps and additional Search inventory. That can extend coverage earlier in the buying journey as well as capture existing purchase intent.
PMax adds the ability to reach potential customers beyond traditional Shopping inventory, including through YouTube, Display, Discover, Gmail, Maps and additional Search inventory. That can extend coverage earlier in the buying journey as well as capture existing purchase intent.
PMax adds the ability to reach potential customers beyond traditional Shopping inventory, including through YouTube, Display, Discover, Gmail, Maps and additional Search inventory. That can extend coverage earlier in the buying journey as well as capture existing purchase intent. So it can reach mid-funnel and high-funnel traffic – users that may not be considering a purchase at the current time, or are in the earlier stages of considering a purchase. So the question is whether incremental cross-channel demand generation is useful and whether we can create the creative required to support it.
Standard Shopping also retains an advantage for products that need more control and advertiser visibility. Negative keywords, product groups, campaign priority and bidding allow us to shape traffic. That tilts the advantage to Shopping for certain cross-sections of products.
When Standard Shopping May Make Sense
Standard Shopping also may be the better choice for new accounts or accounts with limited conversion volume. If the campaign does not have enough reliable conversion data, PMax may not have enough information to optimize effectively.
Standard Shopping can also be useful when granular query filtering matters. If certain high-volume, low-intent search terms are wasting spend, Standard Shopping gives advertisers more direct control through negative keyword management. PMax now allows negative keywords, but it doesn’t have ad group (Asset Group) level negatives which are particularly powerful. And PMax negatives are limited to 10,000 per campaign.
Using standard Shopping can also help protect profit margins. When products have thin margins, limited inventory, or different profitability levels, standard Shopping can make it easier to control bidding and budget more carefully.
What to Watch Closely
Standard Shopping requires hands-on management. Product feed quality, bid strategy, search term review, negative keywords, and product segmentation all matter. For related campaign structure and reporting topics, see Blastoff Advertising’s product feeds articles and PPC reporting articles.
Use Performance Max for Scaling and Cross-Channel Reach
Performance Max is designed to find conversion value across multiple Google channels, including Search, Shopping, YouTube, Display, Discover, Gmail, and Maps. That broader reach can be useful when the product, feed, creative assets, and conversion tracking are ready for automation.
When Performance Max May Make Sense
PMax can be a good fit for proven products that already have sales history, reliable conversion tracking, and strong creative assets. If a product is already performing well in Standard Shopping, PMax may help expand its reach across additional placements.
Performance Max can also be useful when the goal is not only a high individual ROAS percentage, but stronger total conversion value or total profit. A campaign with lower ROAS may still be valuable as long as it produces more LIFT and total profitable revenue.
PMax also benefits from better creative inputs. Strong headlines, descriptions, product images, lifestyle imagery, and video assets give the system more useful material to test. Weak assets can limit what the campaign is able to do.
PMax Isn’t Set-And-Forget
Performance Max should not be treated as a set-it-and-forget-it campaign type. Asset quality, audience signals, conversion tracking, Final URL controls, product feed structure, and reporting still need regular review. For more related strategy, see our adaptive optimization and PPC performance resources.
Hybrid Strategy: Using PMax and Standard Shopping Together
Many ecommerce advertisers do not need to choose only one campaign type. A hybrid strategy can use Performance Max for broader reach while using Standard Shopping for more controlled product coverage, testing, and margin protection.
Segment Products by Business Role
Top-performing products may be strong candidates for PMax when they have enough data, strong margins, and useful creative assets. These products can benefit from broader reach and additional placements.
Products that are not receiving enough visibility in PMax may be better tested in Standard Shopping. This can help force more controlled exposure and give campaign managers a clearer view of product-level performance.
Products with very different margins, inventory constraints, or business priorities may need to be separated into different campaigns. This helps prevent one product group from consuming too much budget at the expense of more profitable or strategic inventory.
Ad Rank Changed the PMax and Standard Shopping Relationship
Historically, Performance Max had priority over Standard Shopping when both campaigns targeted the same products in the same account. Google has changed that relationship. When PMax and Standard Shopping target the same products, Ad Rank now determines which campaign serves.
This makes hybrid campaign planning more useful, but it also means campaign managers need to monitor overlap, product performance, bidding, feed quality, and reporting more carefully. For ecommerce examples, see Blastoff Advertising’s ecommerce client results and Performance Max client results.
How to Decide Which Campaign Type Fits Your Goal
Use Standard Shopping When Control Matters Most
Standard Shopping may be the better option when the account needs tighter control over queries, bids, product groups, and budget. It can also be useful for newer accounts, products with limited conversion data, and product lines where margin control is critical.
Use Performance Max When Scale Matters Most
Performance Max may be the better option when products have proven demand, reliable tracking, clean feed data, and strong creative assets. It can help expand reach beyond the Shopping tab and find additional conversion opportunities across Google’s network.
Use Both When the Product Mix Requires Different Strategies
A hybrid strategy may be the best fit when some products need reach and automation while others need visibility, control, or margin protection. The goal is not to force every product into one campaign type. The goal is to match the campaign structure to the business objective.
Talk With Blastoff Advertising About Shopping and Performance Max Campaigns
Performance Max and Standard Shopping can both play a role in ecommerce advertising, but they need to be configured with the right structure, product feed strategy, tracking setup, and reporting process.
For related topics, see our Performance Max campaign articles, Shopping campaign articles, and PPC campaign management resources.
If your ecommerce campaigns are spending budget but ROAS, lead quality, or product-level performance is difficult to understand, Blastoff Advertising can help review your PMax and Standard Shopping setup, product segmentation, reporting, and campaign strategy.
