The Performance Max Learning Period
The 1–2 week ramp-up window new automated campaigns need before their spend and results settle down.
What it means
A brand-new Performance Max campaign (or any campaign on automated bidding) needs time for the bidding system to calibrate — commonly one to two weeks. It's typical, though not guaranteed, to see a burst of activity in the first day or two followed by a pullback while the system finds its footing.
Why it matters
Making frequent, drastic changes during this window — budget swings, pausing and restarting, big bid changes — tends to reset the learning process rather than speed it up. The single most common reason a new campaign "spikes then dies" is this normal calibration behavior, not a platform malfunction.
ask datanephew
My new campaign spent a lot on day one and then almost nothing — is it broken?
Ask datanephew to pull the daily spend and impressions for the campaign. A first-day burst followed by a pullback is a common pattern during the early learning period, not necessarily a sign of a problem.
How long should I wait before changing anything?
Give a new automated campaign one to two weeks before making budget or bid changes, and ask datanephew to check whether spend has started to stabilize before you touch it.