「成本效益管理系統」(ECPC) 出價策略的運作方式為何？

Enhanced Cost Per Click (ECPC) is a Smart Bidding strategy that automatically adjusts your manual bids in real-time to help you get more conversions. It works by evaluating various auction-time signals, such as device, location, time of day, and other factors, to predict the likelihood of a conversion. If ECPC predicts a higher chance of conversion, it will increase your maximum CPC bid (up to a certain limit) to help you compete more effectively for that impression. Conversely, if it predicts a lower chance of conversion, it will decrease your bid. The other options are incorrect because ECPC's primary function is to optimize for conversions by adjusting bids based on auction-time signals, not to solely decrease bids or directly target a specific ROI, although it contributes to improving ROI.