downloaded it

so i just downloaded smart ftp..But wat am i supposed to do?
wats my username and password? how do i get it?

will someone plz help me?

That is provided by the host of the website or server you're working with.

When working with a website, your website login/pass is the default for the default ftp account. Contact the server admin if you don't know it or if you have access to the website Cpanel, look under FTP for the default account names (or to create new ones).