When you first get set up and your domain becomes active, your URL will most likely bring you to an empty directory listing page or our default welcome homepage. This is because you haven't uploaded your site yet.
If you have uploaded your site, you need to create an index page. An index page can have whatever you want on it, but it must be called "index.html" (or "index.cgi" if it's a CGI program). Calling the file "index.html" tells your visitors' browsers to open that page; otherwise, the browser will just show your file list.
You need to upload your web files in public_html folder.