help uploading

I am new to ftp, so apologies this is such a basic plea for help. Having connected fine I have dragged and dropped one html page as a holdingpage while I design my website. Although the transfer seems to have been successful (says transfer complete and files seems to have moved) nothing is visible on my domain.

Am I missing some vital step - please can anybody help explain things to me in idiot terms as I seem to be the only one having such a basic problem.