Here’s An AdWords Script That Will Let You A/B Test Anything

Columnist Daniel Gilbert wasn't satisfied with AdWords' native A/B testing capabilities, so he and his team wrote a script. 

Any paid search manager will know that A/B testing is a critical part of AdWords success. Few other marketing channels offer such rich data on performance and allow for tweaks as wide-ranging as changing keywords to changing bids every hour of the day.
Yet for some reason, Google’s native testing platform, AdWords Campaign Experiments, is totally deficient. Aside from being clunky and difficult to use, there is the inherent problem that you must set up an experiment as a campaign setting, and therefore cannot test any campaign settings themselves.
At Brainlabs (my employer), we pride ourselves on scientific testing and needed a way around this. As every statistician knows, before/after analysis is weak. That is particularly true for AdWords, which is an auction where everything changes in a minute, let alone two weeks or a month. So we built an AdWords script which we’re sharing below to tackle this problem.
The logic behind the script is actually quite simple. You take a campaign and duplicate it twice. You label each one (I’d suggest “control” and “experiment”), add those labels to the script, and then run it on an hourly schedule.
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