WPA2, or Wi-Fi Protected Access 2, is a security protocol designed to protect wireless networks. It uses strong encryption methods, such as AES (Advanced Encryption Standard), to secure data transmitted over Wi-Fi connections. This helps prevent unauthorized access and ensures that sensitive information remains private. WPA2 is commonly used in both home and business networks, providing a higher level of security compared to its predecessor, WPA. It requires a password for access, making it essential for users to create strong, unique passwords to enhance their network's security.