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John is running a test campaign with CTR as the main KPI. He is trafficking five ads per placement and wants to make sure the best performing ads are displayed more often to end users. Which setup is best suitable to John’s goal?

  • Monitor data and use creative refresh to replace the underperforming ads
  • Monitor performance and manually increase delivery group weights in favor of the best performing ads
  • Create a delivery group with five ads and select β€œautomatic optimization based on CTR” as the rotation method
  • Add five delivery groups to the same placement and detach the underperforming ones