Case studyEcommerce7 days post-change
YouTube conversions +100% with no spend increase
Excluded app inventory + tightened signal quality
- Conversions lift
- +100%
- Spend change
- Controlled
- Conversion quality
- Materially improved
Three coordinated fixes
What we did
01
Excluded all app inventory from the campaign
Biggest impact came from a single decision. App inventory inflated volume but conversion signals were noisy. Learning skewed toward low-quality actions. Once apps were removed, conversion quality snapped back immediately.
02
Built a conversion-focused video system
Not just "more creatives." A conversion-led structure: strong high-impact hook in the opening seconds, clear product framing early, multiple video variations from the same core script. Goal wasn't views. It was qualified action.
03
Layered a purchaser-based first-party audience
Built a lookalike audience from all past purchasers. Layered it into the campaign as a signal input. Anchored YouTube's learning to real buyers and accelerated post-change stabilisation.
Where these numbers come from
Patrick first wrote this account up on the newsletter on 24 January 2026, the week the numbers landed. The figures on this page come from that write-up.
Read the original write-upWant this structure on your account?
Free 30-minute audit. No deck. No pitch.
We screenshare your Google Ads, GA4 and Shopify, run the same audit playbook this account came out of, and leave you the document whether you become a client or not.
Book the call