FTP is how most people transfer files to and
from their website so they they can viewed on the internet. Generally
it involves a piece of software called an FTP client that you install
on your local computer. e.g. WSFTP, CuteFTP. After configuring this
software with your FTP information, you can upload/download your
website files.
Webopedia: Short for File Transfer Protocol, the
protocol for exchanging files over the Internet. FTP works in the same
way as HTTP for transferring Web pages from a server to a user's
browser and SMTP for transferring electronic mail across the Internet
in that, like these technologies, FTP uses the Internet's TCP/IP
protocols to enable data transfer.
FTP is most commonly used to download a file from a server using the
Internet or to upload a file to a server (e.g., uploading a Web page
file to a server).