The acronym VPN stands for "Virtual Private Network." In network security, a VPN provides a secure and encrypted connection over a less secure network, such as the internet. By creating a private network for users, a VPN safeguards data transmissions, protecting sensitive information from unauthorized access and eavesdropping. It also allows users to access restricted content and maintain anonymity online by masking IP addresses. VPNs are commonly used in corporate environments for remote employees to connect securely to the company's network and in personal use for enhanced online privacy.