An advertiser feels that their Smart Bidding strategy is missing potential customers. According to the human-in-the-loop philosophy, what's the likely cause of this performance gap?

The human-in-the-loop philosophy emphasizes that AI systems, like Smart Bidding, perform best when guided by accurate and comprehensive human input. If Smart Bidding is missing potential customers, it's likely because the instructions, goals, or data provided to the algorithm don't fully reflect the advertiser's true business objectives or customer value. The algorithm can only optimize based on the information it receives. Insufficient manual adjustments (A) contradict the purpose of Smart Bidding, which is to automate bidding. A failure in the underlying AI technology (B) is unlikely, as Google's AI is robust and constantly updated. The algorithm prioritizing clicks over conversions (C) is incorrect; Smart Bidding strategies like Target CPA or Maximize Conversions are designed to optimize for conversions.