A VPN app is primarily used to create a private and secure connection over a public network. Its main functions include encrypting your internet traffic to protect sensitive data like passwords and bank details from hackers, especially on unsecured Wi-Fi. It also masks your real IP address and location, allowing you to browse the web anonymously. Beyond security, people use VPN apps to bypass geographical restrictions, enabling them to stream content from services like Netflix or Hulu that may be unavailable in their current country. It's a tool for enhancing both online privacy and digital freedom.