Many hosting sites require you to have a somewhat brief knowledge on using FTP. FTP is like an uploading program, to upload files from your computer to your site. Of course, FTP is much faster than most free hosting sites' uploaders (e.g. Freewebs). FTP is very easy to use. It's merely nothing more than one (or two) clicks!
First, ask your host to make you an FTP account (you will have to supply a login ID and a password. Note that hostesses can access your FTP account at any time, but they really never do it unless they have to remove unappropriate content on your site or something similar). If you haven't downloaded an FTP client, do so now. I use
Smart FTP, but anything will do.
Once you've downloaded it, log on to your account. (Replace host.com your host's domain, and so on)

Here's a brief guide on getting around in your FTP account.

To upload your files, simply copy (
CTRL + C) the files in your computer and paste (
CTRL + V) them into your main work space (view above). All the files in your site will be stored in there.
Now let's get to CHMODing if you ever need to do this: It tells what users can access files. That's it. Problems such as "Permission denied" can be resolved by CHMOD. Sometimes, scripts such as Cutenews require you to Chmod a certain files. You can do this through your FTP client, using the "CHMOD" command (usually found by right-clicking the file(s) you want to CHMOD). The CHMOD command might be found under "properties" or "permissions" too.
Once you have found the option, there is probably a text box with a number in it (often 644) You can change this to the number you want by editting it out. If you can't seem to find the text box, though, you can mess around with the checkboxes until you find the correct number.