The function of a VPN (Virtual Private Network) in internet privacy is to create a secure and encrypted connection between a user's device and the internet. By routing internet traffic through a private server, a VPN masks a user's IP address, providing anonymity and protecting personal information from potential surveillance or hacking. This technology is particularly valuable when using public Wi-Fi networks, where data is more vulnerable to interception. VPNs also allow users to access restricted content and maintain privacy while browsing the web, enhancing overall online security.