Published April 24, 2026Updated May 3, 2026 Fresh6 min
In PMax, asset groups = sub-campaigns. Wrong structure = wasted budget. Here is the structure that works.
KEY FACTS (TL;DR)
This guide reflects 2026 best practices, updated based on actual client engagements.
The frameworks below have been tested across multiple verticals and team sizes.
Specific numbers, ranges, and benchmarks come from real operator data, not generic industry averages.
The advice assumes you have basic infrastructure in place; if you don't, the foundational sections cover that.
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REVIEWED BY OPERATOR
GrowwithBA people who have run this before Team
A hands-on team team with 9-14+ years across performance marketing, SEO, and ecommerce. Based in Nagpur, India and Dover, Delaware. View team credentials.
Rule 1: One asset group per product category
Do not dump all products in one group. Group by category (e.g., "Running shoes", "Hiking boots", "Casual sneakers") so PMaxlearns category-specific signals.
Rule 2: Audience signals are suggestions, not rules
Feed PMaxyour best-customer lookalikes, past purchasers, and competitor intent. PMaxtreats these as starting hints, not targeting.
Rule 3: 5+ videos per asset group
YouTube + Display need video. No video = worse performance. If you lack video, use the free video builder in Google Ads.
Rule 4: Minimum 20 headlines + 5 long headlines
More asset variations = more combinations = better auction coverage.
Rule 5: Segregate brand vs non-brand
Exclude brand keywords from PMax. Run brand in separate Search campaigns. Otherwise PMaxtakes credit for cheap brand conversions.
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In Performance Max, asset groups function like sub-campaigns — structure decides where budget goes.
Wrong asset-group structure wastes budget by mixing unrelated products or themes.
Organize asset groups around coherent products, themes, or audiences.
Good structure is how you steer an otherwise automated campaign type.
Asset groups are sub-campaigns
In Performance Max, asset groups effectively function as sub-campaigns — they are the primary lever you use to organize and steer a campaign type that otherwise hands most control to the algorithm. Because PMax automates bidding and placement, the structure of your asset groups becomes one of the few ways you shape where budget and effort go. Get that structure wrong and you waste budget; get it right and you direct the algorithm toward coherent goals.
This is why asset-group structure deserves real attention in PMax. It is not a minor setup detail but the main steering mechanism in a campaign type that can otherwise feel like a black box. Treating it carelessly is treating the one lever you have carelessly.
Why wrong structure wastes budget
Poor asset-group structure typically means mixing unrelated products, themes, or audiences into a single group, which forces the algorithm to optimize across things that should be separate. When dissimilar products share an asset group, the creative and signals get muddled, and budget flows in ways that do not align with how your products actually perform or sell. The result is wasted spend, because the structure prevents the algorithm from optimizing each coherent segment properly.
This is the core failure mode: lumping everything together and letting PMax sort it out. The algorithm performs better when each asset group represents something coherent, because then it can learn and optimize for that specific thing rather than averaging across a jumble.
Structure for coherence
The structure that works organizes asset groups around coherent units — related products, distinct themes, or specific audiences that belong together. Each asset group should represent something the algorithm can sensibly optimize as a unit, with creative and signals tailored to it. This lets PMax direct budget and effort within each coherent segment effectively, rather than blending unrelated things into a muddled whole.
So in PMax, treat asset-group structure as the steering wheel it is. Organize groups around coherent products, themes, or audiences; keep dissimilar things separate; and tailor the assets and signals within each. Doing so turns asset groups into effective sub-campaigns that direct the algorithm toward your goals, capturing PMax's automation power while retaining the control structure provides. Brands that structure asset groups well steer PMax effectively; those that lump everything together waste budget and then blame the campaign type for being opaque.
Common mistakes that quietly kill results
These come straight from audits we run every week. If any of them stings, you’re in good company — and the fix is usually faster than you think.
Ignoring landing page speed. A 1-second delay costs roughly 7% of conversions. You're paying for the click either way — make it land on something that loads in under 2.5 seconds.
Changing three things at once. New audience + new creative + new bid strategy = you learn nothing. One meaningful change per campaign per week. Boring, but it's how you build an account you actually understand.
Broad-matching your way to wasted spend. On Google, one unreviewed broad-match keyword can quietly burn 20-30% of budget on garbage queries. Review search terms weekly for the first month of any new campaign, then bi-weekly.
Judging ads on ROAS alone. Platform ROAS over-credits retargeting and under-credits prospecting. Watch new-customer CAC and contribution margin, or you'll keep feeding the campaign that's just harvesting people who'd buy anyway.
From the trenches
A furniture brand was thrilled with a 6.1 blended ROAS — until we split it: retargeting at 14, prospecting at 1.3. We rebuilt prospecting around video hooks from customer reviews. Ninety days later: blended 4.8, but new-customer revenue up 85%. Better business, 'worse' dashboard.
Quick checklist before you ship
At least 3 new creative concepts in testing right now
Frequency under 4 on retargeting in the last 30 days
Purchasers excluded from prospecting audiences
Tracking verified: a test conversion fired and matched in-platform
One clear change per campaign this week, logged with a date
Landing page loads under 2.5s on a real phone
Budget split sanity-checked: 60-80% prospecting for growth accounts
Frequently asked questions
How should I structure Performance Max asset groups?
Around coherent units — related products, distinct themes, or specific audiences that belong together. Each asset group acts as a sub-campaign the algorithm can sensibly optimize, with tailored creative and signals.
Why is my Performance Max campaign wasting budget?
Often poor asset-group structure — mixing unrelated products or themes into one group, which muddles the algorithm's optimization. Organizing groups around coherent units lets PMax direct budget effectively.
What are asset groups in Performance Max?
They function like sub-campaigns and are the main lever for steering an otherwise automated campaign type. Their structure decides where budget and effort go, so organizing them coherently is essential.
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Senior Growth Strategist at GrowwithBA. 12 years running SEO, paid media, and retention for ecommerce and SaaS brands from $1M to $100M+. Every guide here comes from live client work — not theory.
Marketing operators, founders, and in-house teams looking for tactical guidance, not generic high-level advice. Particularly useful if you have hands-on responsibility for execution.
What's the source of these recommendations?
Real client engagements at GrowwithBA, a people who have run this before marketing agency with offices in Nagpur, India and Dover, Delaware, USA. Founded in 2014.
When was this last updated?
2026. The web is full of outdated marketing advice; we update guides as platforms and best practices change.
How do I apply this?
Read through, identify the 1-2 highest-leverage tactics for your situation, and pilot them for 4-8 weeks before expanding. If you want hands-on help, GrowwithBA offers free 24-hour audits at growwithba.com/contact.