Chrome 和 Android Privacy Sandbox 可为下面哪两种关键广告使用场景提供支持？

The Chrome and Android Privacy Sandbox aims to support key advertising use cases while enhancing user privacy. "Targeting ads based on user interests" is supported through APIs like Topics, which allows browsers to infer user interests without sharing specific browsing history. "Re-engaging audiences" (retargeting) is supported by APIs like FLEDGE (First Locally-Executed Decision over Groups Experiment), which enables on-device ad auctions for custom audiences. "Tracking users across sites and apps" is precisely what the Privacy Sandbox is designed to prevent, replacing cross-site identifiers with privacy-preserving alternatives. "Seamlessly sharing data with ad brands" is also contrary to the Privacy Sandbox's goal, as it focuses on limiting data sharing and processing data on-device where possible.