The I2P Network (Invisible Internet Project) is an anonymous overlay network designed to protect users' privacy while browsing the internet. It allows users to send messages and access websites without revealing their identities or locations. I2P achieves this by routing traffic through a series of volunteer-operated nodes, making it difficult to trace the origin of the data. I2P is often used for secure communication and hosting hidden services, similar to the Tor Network. It supports various applications, including email, file sharing, and web browsing, all while maintaining a high level of anonymity for its users.