IP address is used for the web site server. The website server has thousands of web pages and those pages can only be accessed with the help of Domain name. When you type IP address in type the toolbar then it will linked to the server like oxford server, but you can't access any page because server won't be able to process the request as you have not identified that which webpage you want to open. Secondly Domain names are easy to remember but IP addresses are hard to remember because they are written in numeric form.