Attack of the clones: Here’s a script to fight duplicated ads

You know those nightmares where your reflection comes out of the mirror and steals your life? Just me? Well, anyway, this is like that — but in AdWords.

Sometimes you make a mistake with AdWords Editor, but instead of changing the existing ad, you create a new one. Or you’re overzealous in converting your old standard ads and make two expanded text ads (ETAs) instead of one.

Suddenly, you’ve got multiple ads that are exactly the same. That means your ad testing isn’t working right, because the traffic isn’t being served evenly between the different ad variants; instead of an A/B test, it becomes an A/A/B test. Even if your testing works, the data is split out between the doppelgängers (that’s German for “ghostly twin,” or something).

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