Some websites allow hundreds of different data collection companies to watch you, build a profile of you, and serve you ads as you browse the web. Intelligent Tracking Prevention in Safari uses on-device machine learning to help block those trackers.

Advertisers can also create a “fingerprint” of your device to target you based on characteristics like your browser configuration, and fonts and plug-ins you’ve installed. To help prevent this, Safari has built-in fingerprinting defense, which shares a simplified system profile with websites you visit. Making it even more difficult for data companies to identify you.