VPN stands for Virtual Private Network, which is a technology that creates a secure, encrypted connection over a less secure network, such as the internet. Its primary function is to protect users' privacy and data by masking their IP addresses, allowing them to browse the web anonymously. VPNs are commonly used to bypass geographic restrictions on content, access public Wi-Fi safely, and protect sensitive information from potential cyber threats. Through its encryption capabilities, a VPN enhances online security and promotes secure communication.