Answers
What counts as an anomaly worth acting on?
A sharp break from the account's own pattern — not a bad day.
The short answer
A sharp break from the account's own pattern — not a bad day.
Spend doubling without a budget change, conversions falling to zero while clicks continue, a sudden wave of disapprovals, or CPC jumping sharply overnight. Those are structural, and they usually have a cause you can find.
Normal variance is normal. Reacting to it is how accounts end up permanently learning.
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