FTP access allows you to upload new content to your website for your users to see.
Here is the FTP info:
FTP Host Name: mydomain.com
FTP login and password: This information can be found inside your activation e-mail, and is normally selected during sign-up.
Host Directory (Linux accounts): public_html
Host Directory (Windows accounts): httpdocs
Most web authoring tools (e.g. Dreamweaver, Frontpage) include a remote server setup form for directly uploading your files via FTP.
Alternatively, you can use a third party tool, such as CuteFTP, FileZilla, etc.