It'll take your server name, port, logon details and so on, then save them for speedy access later. However you get connected, WinSCP is very easy to use. (Though if the server doesn't support SFTP, WinSCP can always make a regular, insecure FTP connection instead.) As long as the remote computer you're trying to reach also supports this protocol, then you'll be able to create an encrypted connection that keeps your data and files safe from snoopers. WinSCP is a transfer tool that can protect against this problem by connecting using the Secure File Transfer Protocol (also known as SSH). That means that, in theory at least, anyone with a well-placed packet sniffer could intercept your FTP traffic, read user names, passwords, then grab all your transferred files.
While FTP can protect against unauthorised access with simple password authentication, the FTP connection itself is unencrypted. Which is probably why it's usually the protocol of choice when it comes to uploading files to a web server. FTP may be one of the oldest Internet protocols (it was first officially defined in 1971), but it's still one of the simplest, fastest and most efficient ways to transfer files from one PC to another.