Chapter 01
The demand ceiling nobody talks about
There are two jobs in a paid account: capture demand that already exists, and create demand that doesn't yet. Search, Shopping, and Performance Max are harvest channels. They're brilliant at scooping up people already looking. But there's only so much existing demand at any moment, and once you own most of it, pushing more budget into harvest just bids up the price of the same clicks. ROAS falls and you blame the platform.
This account had hit that wall. Impression share on the core terms was above 70%, branded search was flat, and every budget increase on Search and PMax dropped the ROAS. It wasn't a budget ceiling. It was a demand ceiling. The fix isn't to harvest harder, it's to plant.
