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Quick Fix
Performance
After I edited my campaign, CPM spiked and delivery dropped. Why?
Editing a campaign resets or disrupts the learning phase. During learning, CPMs are elevated and delivery is unstable. The more significant the edit, the larger the disruption.
What this means
Editing a campaign resets or disrupts the learning phase.
Quick steps
- Check campaign edit history for recent changes
- Compare CPM from week before edit to week after
- Check if delivery shows Learning or Learning Limited status
- Note how many days since the edit (learning resolves in ~7 days)
- Avoid making additional edits during learning phase
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