FTP stands for File Transfer Protocol, and it plays an important part in the management of a website. It is a network protocol which enables the transfer of computer files from one host to another over the Internet.
FTP originated as a command line application, when it served many of the same functions as it does today. Since then, FTP clients have been developed to make the process of transferring files more user-friendly and to support stronger, safer and more secure levels of encryption. These are regularly updated to ensure that the highest levels of security are maintained, which is very important for creating a more secure web for users around the world.
What is probably the most popular FTP client is called Filezilla. With Filezilla you can use two different Protocols, standard FTP and SFTP, which is used to transfer files to SSH servers.