A kill switch is a cybersecurity feature, commonly found in VPN services, that automatically blocks all internet traffic if the VPN connection unexpectedly drops. This prevents your real IP address and sensitive data from being exposed to the internet, maintaining your privacy and security. Without a kill switch, a sudden VPN disconnection could leave your online activity unprotected. Kill switches are essential for users who require continuous anonymity and data protection, such as journalists, activists, or anyone accessing sensitive information online.