智慧出價如何在保護隱私權的情況下提高成效？

Smart Bidding enhances performance while respecting privacy by leveraging an account's conversion data and billions of contextual signals (like device, location, time of day, etc.) to optimize bids in real-time for each auction. This allows for precise bidding adjustments without relying on individual user-level identifiers that raise privacy concerns. The other options describe features that either expand reach (which is not directly about privacy-preserving performance optimization), incorrectly claim to fill gaps in third-party cookie measurement, or involve exporting audience lists to third parties, which could introduce privacy risks rather than mitigate them.