Managing large catalogs in Google Performance Max can feel like handing the algorithm your wallet and hoping for the best. 

La Maison Simons faced that exact challenge: too many products and not enough control. Then they rebuilt their segmentation with Channable Insights and turned a “black box” campaign into a revenue-generating machine.

Step 1: Stop segmenting by category

Simons originally split campaigns by product category. It sounded logical – until their best-selling sweater ate the budget and newer or overlooked products never had a chance to surface.

Static segmentation meant limited visibility and slow decisions.

Marketers stayed stuck making manual tweaks while Google kept auto-prioritizing only what was already working.

Step 2: Segment by performance

Enter Channable Insights. Product-level performance data (ROAS, clicks, visibility) now powers dynamic grouping:

Products automatically move between these segments as performance shifts – no manual work needed. As Etienne Jacques, Digital Campaign Manager, Simons, put it:

“One super popular item no longer takes all the money.”

Step 3: Shorten your analysis window

Instead of waiting 30 days for signals, Simons switched to a rolling 14-day window.

The result: faster reactions, sharper accuracy, and less wasted spend in a fast-moving catalog.

Step 4: Push the strategy across channels

Why stop at Google? The same segmentation logic was automatically applied on:

• Meta
• Pinterest
• TikTok
• Criteo

Cross-channel consistency creates compounding optimization.

Step 5: Watch the metrics climb

Without raising ad spend, Simons unlocked:

• ROAS growth: from ~800% to ~1500%
• CPC decrease: $0.37 to $0.30
• CTR lift: 1.45% to 1.86%
• 14% increase in average order value
• 1300% ROAS for New Arrivals campaigns
• Faster workflows and fewer manual tweaks

Even the “invisibles” turned into surprise profit drivers once they finally got the spotlight.

Step 6: Treat automation as control, not chaos

Automation restored marketing control – it didn’t remove it.

Teams can finally learn from the data and influence which products grow, instead of letting PMax run everything on autopilot.

Your action plan

• Classify products as Stars, Zombies, and New Arrivals.
• Automate campaign reassignment based on real-time data.
• Refresh product insights every 14 days.
• Roll out segmentation logic to every paid channel.
• Scale what wins – test what hasn’t yet.

Want Simons-style ROAS gains without extra ad spend? Start by testing the quality of your product data with a free feed and segmentation audit.