All clear now?
Let's say you want to visit the BBC News website or here: the Artbust website. First you open your browser. Sounds all too familiar?

A web browser is the software program used to access the World Wide Web.

A browser (also known as client software) retrieves data from remote web servers, assembles it, then displays a web page.

The two most popular browsers are Microsoft Internet Explorer and Mozilla Firefox.
Browsers basically work the same way. Once you know one, you can easily use others.

You need to type a URL exactly for your browser to locate the desired web page or "document" ("file on the other computer"), otherwise you will access the wrong site (or document) or get an error message.

The location box or address field on your browser indicates the URL of the page you arrived at after clicking a link. Then enter the address or URL of the website in your browser by typing a alphanumeric code in, as you would use a old-fashion typewriter. But in fact you are doing something different:
Think again of the internet as a spider net, in other words, a vast collection of electronic files stored on millions of computers all around the world. Hypertext links these files together.

Uniform Resource Locators or URLs are the addresses used to locate the files. The information contained in a URL gives you the ability to jump from one web page to another with just a click of your mouse. When you type a URL into your browser or click on a hypertext link, your browser sends a request to a remote computer, called a web server, to download one or more files. Every URL is unique and identifies one specific file.

http://		short for Hypertext Transfer Protocol, this indicates a Web document or directory
www.		stands for World Wide Web. This means that the page you're looking for is somewhere on the World Wide Web.
artbust.com/		the domain name, it often indicates the name of a company, university, or organisation. It can also tell you the country of origin of the desired document. It tells you where the web page is registered, and often tells you what kind of web site it is. For instance, ".com" usually means that you're looking at a commercial site, or a site that someone has paid to use. Some other common domain names are ".edu" (sites for educational institutions), ".org" (sites belonging to nonprofit organisations), and ".gov "(sites sponsored by local, state, or federal governments), ".de" for Germany, ".fr" for France, a.s.o..The endings are regulated by INTERNIC or their world wide partners, which hold the database of the unique list of domain names.
www.artbust.com/		indicate the (once in the world existing,) unique web server name
WebForBeginners/		is the (case sensitive!) directory or folder on the web server that contains a group of related web pages and documents within the website
index.html		is the (case sensitive!) web page inside the folder. (The same file can be named welcome.html) , but an index page will ge always addressed by any browser, even if you only write the directory name and it will not exploid your content.