如果廣告客戶在目標客戶比對名單中加入一位使用者，使用者資料會受到什麼影響？

When an advertiser uploads a user to a Customer Match list, Google takes strong measures to protect that user's data. The data is hashed before being uploaded, meaning it's converted into a unique, irreversible code. This process ensures that the original user information remains private and is not directly accessible to Google employees or other advertisers. Google uses this hashed data solely to match against its own user base for targeted advertising campaigns, and it is not shared with other Google products, publishers, or made public to all marketers. This commitment to data privacy is a core principle of Google's advertising policies.