A domain name serves as an alias for the numeric IP address of a website. It makes the website address easier for humans to remember and type. Domain names have three parts - the www prefix, the domain name itself which is registered, and the top level domain extension like .com or .in. There are many free generators and registrars that help users find and register available domain names. When choosing a domain name, it is best to pick short, easy to pronounce names that incorporate your main keywords and reflect your business niche in order to aid search engine optimization and user understanding.