URL stands for Uniform Resource Locator. Every web page has a unique address on web. This address is called the URL address of the web page. A web page is accesses on the Internet with reference to its URL address.

Format of URL
The General format of the URL is as follows:

type://address/path/

Where

type: specifies the type of the server on which the page is stored such as "http" or "ftp". It is followed by a colon & double slashes (//).
address: specifies the address of the server such as "www.google.com". The use of "www." is optional.
path: specifies the path of the page on the disk of the server. The forward slash (/) character is used in the document path.

The address http://www.google.com is an example of URL address.
Following are some important URL addresses:

http://www.google.com
http://www.hotmail.com
http://www.yahoo.com
http://www.amazon.com

What is URL - Format of URL