The problem we walked into
The brand was celebrating a rising click-through rate on Meta while Google search CPA drifted past target. Spend looked healthy. Pipeline did not. We needed a test that judged creative and bids on contribution — not applause metrics.
What we changed
- Split audiences into prospecting, warm, and converters — separate budgets, separate KPIs.
- Rebuilt hooks around offer clarity instead of lifestyle fluff.
- Moved bids toward conversion value where signal was strong; capped frequency where it was not.
- Held a control flight so we could prove lift, not just correlation.
The result
Over four weeks, blended CPA dropped 32% while unique reach held within 6% of baseline. The win was not a clever trick — it was refusing to optimize for the metric that made the dashboard look good.
What to steal for your brand
Pick one conversion event that maps to revenue. Protect a reach lane. Kill creatives that earn clicks without that event. Report both numbers side by side so the team cannot hide behind CTR.