FTP, or File Transfer Protocol, is a standard network protocol used to transfer files between a client and a server over the internet. It allows users to upload, download, and manage files on remote servers easily. FTP is commonly used for sharing large files, website management, and data backup. To use FTP, you typically need an FTP client, which is a software application that connects to the server. Users enter their credentials, such as a username and password, to access the files. This makes it a secure and efficient way to handle file transfers, especially for businesses and web developers.