Secure File Transfer Protocol (SFTP) is a network protocol used to transfer files securely over a secure connection. It operates over the SSH (Secure Shell) protocol, ensuring that data is encrypted during transmission. This protects sensitive information from being intercepted by unauthorized users. SFTP allows users to upload, download, and manage files on remote servers. It provides features like file access control and directory listing, making it a reliable choice for businesses and individuals who need to share files securely. Overall, SFTP is essential for maintaining data privacy and integrity during file transfers.