What is The Domain Name and Why We Need A Domain

The most important element in making a website is the ownership of domain names and hosting. Without having a domain and hosting, it is impossible you can build a website.
If you visit a website site, you must type in an address. Suppose, www.ellution.com. The address is the location of 'geography internet. If you want to visit a 'home', you must first have the address that you want to go. The address is unique. None of whom have the same address. On the Internet, the address is called with the term domain name.

Actually, the address on the internet is not as simple as that. This address is a series of numbers that allow it will be difficult to remember. Well, this domain name role is to simplify addressing a meticulous.
Okay, maybe from the idea of ​​the real at the top, you've got an idea of ​​why you need a domain name. Which may be the question is, why there dot com, org, edu, and etc.?
I will answer your questions. But I would limit it to not discuss it too technical. All you need is enough to know for consideration. Now look the following domain:

google.com
google.co.id
...

From the example above, you can see. A 'name' can consist of several domain name. What's the difference? yes, the back of the domain. Here is a list of top level domains:

Which one is suitable for your site? If the site is a personal site that is intended to earn income from the internet, I recommend using a dot com. People are more familiar with the dotcom.