Google's Out to Remake the Ad World Again

The search giant is rolling out a broad trial for advertisers, where they pay only if they get what they want

Google (GOOG) is trying to change the advertising game yet again. On Mar. 20, the king of pay-per-click search advertising said it would begin a broad new advertising trial in which marketers will pay only when customers take a specified action, such as completing an online purchase.

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