最佳化指定目標對象如何尋找新的高成效目標對象？

The correct answer leverages existing targeting data, including valuable first-party data, and applies privacy-centric machine learning models to identify new, high-performing audiences. This approach respects user privacy while using sophisticated algorithms to find patterns and expand reach effectively. Using "Customer Match audiences" from other accounts (Option 1) is not a standard or recommended practice for finding new users and raises significant privacy concerns. Changing geographical regions and languages (Option 2) broadens targeting but doesn't inherently optimize for new high-performing audiences; it's a manual adjustment rather than a data-driven optimization. Using algorithms to collect landing page data for keyword quality score improvement (Option 4) is related to search engine optimization and ad quality, not directly to finding new high-performing audiences.