This post was sponsored by Channable. The opinions expressed in this article are the sponsor’s own.
If you’ve ever watched your best-selling product devour your entire ad budget while dozens of promising SKUs sit in the dark, you’re not alone.
Google’s Performance Max (PMax) campaigns have transformed ecommerce advertising since launching in 2021.
For many advertisers, PMax introduced a significant challenge: a lack of transparency in budget allocation. Without clear insights into which placements, audiences, or assets are driving performance, it’s easy to feel like you’re flying blind.
The good news? You don’t have to stay there.
This guide walks you through a practical framework for reclaiming control over your Performance Max campaigns, allowing you to segment products by actual performance and make data-driven decisions rather than hope AI figures it out for you.
The Budget Black Hole: Where Your Performance Max Ad Spend Actually Goes
Most ecommerce brands start by organizing PMax campaigns around categories. Shoes in one campaign. Accessories in another. That seems logical and clean but can completely ignore how products actually perform.
Here’s what typically happens:
- Top sellers monopolize budget. Google’s algorithm prioritizes products with strong historical performance, which means your star items keep getting the spotlight while everything else struggles for visibility.
- New arrivals never get traction. Without performance history, fresh products can’t compete, so they never build the data they need to succeed.
- “Zombie” products stay invisible. Some items might perform well if given the chance, but static segmentation never gives them that opportunity.
- Manual adjustments eat your time. Every tweak requires you to dig through data, make changes, and hope for the best.
The result? Wasted potential, uneven budget distribution, and marketing teams stuck reacting instead of strategizing. You’re already doing the hard work; this framework helps that effort go further and helps you set and manage your PPC budget efficiently and effectively.
How To Fix It: Segment Campaigns By What’s Actually Working
Instead of organizing campaigns by category, segment by how products actually perform.
This approach creates dynamic groupings that automatically shift as performance data changes with no manual reshuffling.
Step 1: Classify Your Products into Three Groups
Start by categorizing your catalogue based on real performance metrics: ROAS, clicks, conversions, and visibility.

Star Products
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