The main advantage of using virtual private networks (VPNs) is the enhancement of user privacy and security while accessing the internet. VPNs create a secure, encrypted tunnel for data transmission, which helps protect sensitive information from cyber threats and unauthorized access. Additionally, they enable users to bypass geo-restrictions by masking their IP addresses, allowing access to region-specific content. VPNs are essential tools for ensuring safe browsing practices, especially on public Wi-Fi networks.