Domain Name: A domain name is a string used to name Web sites and other servers on computer networks.
On the Internet, these strings are managed by the Domain Name System (DNS). The DNS uses a system of multi-level strings separated by dots ('.') to organize domain names.
Domain Name
.com - Stands for company/commercial, but it can be used for any web site.
.net - Stands for network and is usually used for a network of sites.
.org - Stands for organization and is supposed to be for non-profit bodies.
.us, .in - They are based on your country names so that you can go for country specific domain extensions,