It tells you what the computer is doing. It reports when it found the site you requested, how much of it has been downloaded, and when it is done. Another way to tell is by looking at the arrow that is following your mouse on the screen. An hour-glass will appear on or near it when the computer is doing something. Just be patient, the Internet can be slow.
All websites have an address.
It does, and if you know the code, you can use it to help you find a site you might be interested in. Http stands for Hypertext Transfer Protocol. Say you wanted to find Disney's site. Just add the company name to the most likely beginning. Sometimes you'll see an address with forward slashes following the actual address.