The primary function of a VPN (Virtual Private Network) is to provide a secure and private connection over the internet. By creating an encrypted tunnel between a user’s device and the VPN server, it protects data from potential eavesdroppers and unauthorized access. VPNs mask the user's IP address, enhancing privacy and allowing access to region-restricted content. They are commonly used for secure remote access to corporate networks, ensuring that sensitive information remains protected from exposure, while also providing anonymity during online activities.