04/09/2026
Creative fatigue rarely shows up in one metric at the same time.
Frequency can climb while CTR still looks fine.
CTR can start slipping before CPA gets ugly.
And CPA often tells you the story last, once the account has already spent money learning the creative is tired.
So which signal should you watch first?
Usually, look for the pattern:
Frequency starts rising.
CTR stops holding.
CPA follows.
The useful part is catching the change before the last number moves.
Nexus by Omniconvert tracks creative performance over time and flags when an angle or ad starts losing efficiency, so teams know what needs fresh creative before CAC takes the hit.
If you only check CPA, you are often finding fatigue after it already became expensive.