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google AI performance ads
What is the value of running a true A/B test with campaign experiments?
Correct: In an A/B test, trial campaigns run at the same time as the original campaign, controlling for external factors (e.g. seasonality) that may otherwise bias results.
The selection is correct because running trial campaigns at the same time as the original campaign is the only way to achieve a "true" A/B test that effectively controls for external factors such as seasonal demand, holiday traffic spikes, or shifts in competitor behavior. Unlike sequential testing—where one campaign follows another and performance differences might simply be due to the time of month or a change in the weather—simultaneous experimentation splits traffic randomly between the control and the trial in real time. This ensures that any observed lift in performance is statistically significant and directly attributable to the specific variable being tested, such as a different bidding strategy or new creative assets. By neutralizing these environmental variables, advertisers gain the high-confidence data needed to make informed decisions about scaling AI-powered optimizations across their entire account without the risk of bias from outside market forces.