A kill switch can help prevent your privacy from being breached when your encrypted VPN connection stops working. This is why your VPN needs it.
An iPad disconnected from the Internet
An iPad disconnected from the Internet
The basic idea of a virtual private network (VPN) service is that your connection is more private. Using a secure encrypted VPN connection, your online actions are not able to be monitored by other web traffic.
However, there are occasions where you may not have the protection of a VPN. Rather than the encrypted tunnel to a different server, you may suddenly find yourself directly accessing the internet without the VPN.