What is the directory?

In your instructions it states: “If you need to upload your files to your web server, use your favorite FTP client to upload all the contents of the wordpress directory (but not the directory itself) into the root directory of your web site.”

What do you mean by “but not the directory itself”? This is confusing and I’m not sure what you mean. I want to have my blog be the root, but I don’t want to install this incorrectly. From what I gather I am to upload all my files to the root server, but not the directory. However I don’t see a “directory” in the worpress folder I downloaded. I’m not sure what to do.