By replacing the manual work done by the PPC expert with an automation that follows their logic, PPC teams can still have more control over automations created by the ad engines.
Please visit Search Engine Land for the full article.
Original source: http://feeds.searchengineland.com/~r/searchengineland/~3/akU7hnHB_jw/automation-layering-how-ppc-pros-retain-control-when-automation-takes-over-318592