Need of a Domain Name

Domain Name increases your name recognition. Makes it easy for your customers to remember your address
Indicates you are a serious Internet player. Helps brand your image. Adds a level of trust and integrity to your site. Many search engines refuse to list pages from free sites. Some search engines will only index the first page of a domain site. Domain names containing 'keywords' aid in higher search engine ranking.
To understand why you need a domain name you first need to know how a domain name works.
A domain name is an addressing construct, used for finding and identifying computers on the Internet. Computers use Internet Protocol (IP) Addresses, which are a series of numbers used to identify each other on the Internet; however, many people find it hard to remember IP Addresses. Because of this, domain names were developed so that easily remembered names and phrases could be used to identify entities in the Internet instead of using an IP Address.

Need of a Domain Name