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.

This issue is common among Meta advertisers and usually indicates a structural or optimization problem that can be resolved with the right approach. Understanding the mechanism behind the problem is the first step to fixing it.

This problem typically stems from one or more of the following:

• 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

Follow these steps to identify the root cause:

1. Check campaign edit history for recent changes
2. Compare CPM from week before edit to week after
3. Check if delivery shows Learning or Learning Limited status
4. Note how many days since the edit (learning resolves in ~7 days)
5. Avoid making additional edits during learning phase

Once you've identified the cause, apply these fixes:

1. Start by identifying the root cause using the diagnostic checklist above
2. Make one change at a time and wait 24-48 hours to see results
3. Document what you changed and the outcome for future reference
4. If the issue persists, consider reaching out to Meta support with specific details
5. Use the quick fix page for immediate action items