Domain name is the name by which you or your business will be known on the World Wide Web. Even if you don't have a website up yet, it is often a good idea to register your domain to avoid someone else getting and using the name that you want. You need a domain so that people who use the Internet can find your site on the World Wide Web.
Three of the most popular level domains are .com, .net, and .org. By far the most sought after is the .com domain name. The .com and .net levels are usually associated with commercial sites and the .org is usually associated with non-profit organizations. A good .com name associated with a business gives it a good presence on the net and provides a sense of professionalism.
How should you name your domain?
Try to register a domain which contains a popular keyword applicable for your industry. This will help your customers remember your domain name better. Furthermore, for searches conducted in Yahoo!, a higher ranking will be given to those web sites which contain the keywords in the title.
Don't make your primary domain too long. Even though you can use up tp 67 character for your domain, your customer may not remember your domain name.
Always use ".com". If yours is a serious business site. You can consider registering a ".net" domain, most people are familiar with ".com".
You DO NOT need to be registered with the Registry of Companies and Businesses, the Trade Development Board or any professional body to use international domain.