RPM drop: wait with segmentation or change ad layout now?

RPM drop 대응에서 segmented diagnosis와 immediate layout change를 비교하는 질문.

When RPM drops, changing ad layout immediately can feel productive. But if the cause is traffic mix, seasonality, coverage, or reporting delay, a layout change can make the data harder to read. On the other hand, if the drop starts right after a consent banner, template, or ad placement change, waiting may be unnecessary. What evidence would make you revert layout immediately instead of building a triage packet first?