VPN (Virtual Private Network) is a type of internet service that allows users to access the internet over a private network, providing a secure and private connection for browsing the web, streaming content, or downloading files. VPNs are often used to protect online activities from being tracked or understood by third parties. Coast is a type of VPN that uses the OpenVPN protocol to establish a secure connection. OpenVPN is a widely used and well-supported VPN protocol, and it is often used for web browsing, file sharing, and other internet services.