The moment I realised I was optimising for the wrong metric the entire time.
It took me longer than I want to admit to figure this out.
I was obsessing over CTR. Every creative decision, every targeting tweak, every copy change was in service of getting that number up. And it kept going up. Felt like progress.
Then I actually looked at what was happening downstream. High CTR campaigns were producing lower quality leads that converted at half the rate of campaigns with mediocre CTR. The metric I had been treating as North Star was actively pointing me in the wrong direction.
The problem is CTR is easy to measure and immediately visible. Downstream conversion quality takes longer to see and requires more work to track properly. So I optimised for what was easy to see instead of what actually mattered.
This pattern shows up everywhere in affiliate marketing. We chase the metric that is most visible rather than the one that is most connected to actual outcomes.
What metric did you spend too long optimising before realising it was the wrong one?