The security level you choose for a website often has a direct impact on that site’s performance. These are the specific implications for each level. Some of the protections can be overridden or modified by changing your security settings.
Websites may break. But you get great security.
Many website features are disabled. Many websites won't work or will display poorly, but your identity is protected from all but the most aggressive adversaries.
When to Use: Use when you’re concerned about adversaries discovering your identity and monitoring or censoring your activity.
Universal Link Protection: Yes (website links can't open apps on the device)
Ad- and Pop-up Blocking: Yes
Works pretty well. Your identity is mostly protected.
Some website features are disabled.
When to Use: Use when you need to evade censorship and prevent someone from monitoring your activity, but are less concerned about leakage of your identity to adversaries.
Universal Link Protection: Yes
Ad- and Pop-up Blocking: Yes
Easy breezy. Though it could be dangerous.
Most website features are allowed.
When to Use: Use when you’re concerned about your activity being logged, but accept that some of it might be monitored.
Universal Link Protection: Yes
Ad- and Pop-up Blocking: Yes