Block Malicious Sites is a feature in VyprVPN that blocks websites associated with malware that could be harmful to your device. Content Blocking will show as a Key icon or active connection in your Notification Bar as it utilizes local VPN services.
If you visit a website on the block list we use (here), you will see a 404 generic error page and the website will fail to load. This will prevent that website from harming your device.
Note: Samsung Galaxy S3 devices will experience Block Malicious Sites not working unless an active VPN connection is established.