I've seen this exact scenario play out more times than I care to count. CTR sits front and centre on every agency dashboard - the client call opens with it, creative decisions revolve around it. It feels actionable, until you actually map those clicks back to CRM data. That's when you realise your highest CTR campaigns were pulling in curious browsers, not serious buyers. The click was genuine, the intent wasn't.
The worst example I encountered: an 8 % CTR on broad match, leadership celebrating the win, and three months later we killed the campaign because pipeline from that cohort was zero. The metric was technically accurate - it just measured the wrong thing.
I've since shifted focus to conversion rate, cost per qualified lead, and pipeline influenced. CTR is now a diagnostic, nothing more. It's useful for spotting creative fatigue or platform issues, but never as a KPI in its own right.