Safari is designed by Apple with a "Privacy-First" high-fidelity philosophy, meaning it actively works to prevent websites and third-party advertisers from seeing your browsing history. Through a feature called Intelligent Tracking Prevention (ITP), Safari uses on-device machine learning to block cross-site trackers from creating a profile of your interests. While the browser technically "sees" your data to provide features like AutoFill, iCloud Keychain sync, and Siri Suggestions, Apple claims this data is processed locally on your device or via "Private Cloud Compute" where it is never stored or accessible to Apple employees. In Private Browsing Mode, Safari goes a step further by not saving your history, searches, or form data at all. However, it is a high-fidelity reality that your Internet Service Provider (ISP) and the individual websites you visit can still see your IP address and activity unless you use a VPN or the high-fidelity iCloud Private Relay feature, which masks your traffic even from the network provider.