Short for Internet Service Provider, this is a service you pay for to connect to the internet. ISPs can record your browsing history and may be able to sell it to third parties, for marketing or other purposes.
What happens if a VPN provider’s network connection fails? Your computer or mobile device will default back to the public IP address provided by your ISP. This means that your online activity can now be tracked. A kill switch, though, prevents this from happening. If your VPN provider’s connection fails, the kill-switch feature severs your connection to the Internet completely. This way, your online activity won’t be monitored by others.