The acronym "VPN" stands for Virtual Private Network. Its primary use is to create a secure, encrypted connection between a user's device and a remote server, allowing users to browse the Internet anonymously and safely. VPNs protect sensitive data from potential threats like hackers and surveillance, especially when using public Wi-Fi networks. By masking the user's IP address and encrypting online activities, VPNs enhance privacy, enable access to geo-restricted content, and help maintain digital security.