When you log into ftp you will see all the folders the server needs to maintain your account, the public_html folder is where all your site content is located. If you set your ftp program's destination folder to public_html only then you will see the content available on the web. We recommend that all customers set this up in their ftp program to avoid confusion and to avoid accidentally deleting the folders the server needs for functions on your account. If you delete everything in your public_html folder this will delete your entire website. We recommend creating a backup up of your account in the cpanel first, so that if you ever need to restore any files you can do it through your account which is faster and free.