Campaign Consolidation Is a Risk, Not a Best Practice

The Consolidation Push

Google's machine learning works best with volume. More conversions per campaign means better predictions. More data per ad group means faster learning. This is true from the algorithm's perspective.

But the algorithm optimises for the target you set. If you set one ROAS target across products with 20% and 60% margins, the algorithm will happily hit that target by over-indexing on whichever products convert most easily - regardless of whether those are your most profitable. This is how Google Ads turns £100 into £1 at scale.

What You Lose

• • Margin-specific targeting: You can't set different ROAS targets for different margin tiers in one campaign
• • Budget control: High-converting low-margin products consume budget meant for slower high-margin ones
• • Diagnostic clarity: Performance problems are hidden inside blended campaign-level metrics
• • Strategic flexibility: You can't pause clearance SKUs without affecting hero SKUs - this is the foundation of the SKU Jobs Framework
• • Seasonal control: Different product categories peak at different times, as we explore in seasonal budget mistakes

When Consolidation Works

Consolidation is appropriate when you have a small catalogue (under 200 SKUs), uniform margins across products, a single commercial objective, and sufficient conversion volume in each campaign.

DTC brands with a focused product range and consistent pricing often benefit from consolidation. The algorithm gets enough data, and the margin uniformity means one target works.

When It Doesn't

Multi-category retailers, brands with wide margin variation, businesses with seasonal product ranges, and anyone with SKU-level strategic roles (hero, gateway, clearance) need segmented structures.

If your margins range from 18% to 65% across your catalogue, consolidation guarantees that low-margin products will cannibalise budget from high-margin ones. The algorithm doesn't know about margin. It only knows about conversions. The same logic explains why most PMax campaigns are just expensive brand campaigns.

The Right Structure

The right number of campaigns is determined by your commercial requirements, not by best practice guides. Ask: how many distinct margin tiers exist? How many different strategic roles do your products serve? How many seasonal patterns operate independently?

Each answer that returns "more than one" is an argument for segmentation, not consolidation. This is also why audience segmentation for profit requires structural support in your campaign architecture.

Next Steps