A domain name is basically your website address on the internet. When people search for your website they put your domain name (web address) into their browser to locate it.
Without a DN your site simply does not exist online and can not be found by searchers.
Why Do I Need A Domain Name?
You need a DN so that your website has an address online so that people can locate your website's pages. If you own your own website you need to have a DN for your site.
How Do I Get A Domain Name?
There are many companies online that sell DN's for a reasonable price. Once you buy a DN from one of these companies then your website will have a web address and make it accessible to the online world.
NOTE: You also must have web hosting for your site to be visible online (explained later …)
How Do I Choose A Domain Name?
When you choose a DN it is important to keep it relevant to what your website is about. This makes it relevant and easy to remember for your visitors and allows the search engines to rank your website high when people search for your site.
Example: If I had a site that was about helping women with morning sickness one relevant DN I could use would be: morningsicknesscures.com, another DN could be: morningsicknessremedies.com. There are literally many different combinations you could use but the important thing is to get your niche specific keywords into your domain name if possible.
What If The Domain Name I Want Is Taken?
If a DN you want is taken you can try to find different variations of your desired DN. Many web addresses end in.com but there are other top level domain endings you can use like.net or.org. Quite often these are not taken so you can use them instead of a.com ending if it is already taken.
There are also other variations you can use at the end of your DN like.biz, .info, .tv etc. if all other options are exhausted. If no options at all are available for your desired name then you either need to choose different related keywords or get creative and add extra words to your DN eg. best morningsicknesscures.com (If morningsicknesscures.com was not available and all other endings were not available then I could try adding other descriptive words like best to my DN to see if that creates a unique DN).
What Is Web Hosting?
Web Hosting or 'Hosting' is a service provided by a vendor which offers a physical location for the storage of web pages and files from your website. Think of a Web Hosting Company as a type of landlord, they rent physical space on their servers allowing webpages to be viewed on the Internet.
Web hosting is usually charged as a monthly fee by most suppliers and is required if you have your own site so that your site is accessible to the online world.