What is a role of a client?

What is a role of a client?
What is the need of a USER in Internet.. :)
Actually "Client" can be term used for a "user".i.e. A client is an application or system that accesses a service made available by a server.

Client sends request to the server for its further access.
Server responses to the client request.


Client is your browser. It sends a URL as request to the Server.
Sever responses to the client request. so that the corresponding page is displayed in your browser. This is the process of Client and Server communication.