Hi... MVC is the one of the design pattern which enables 
you to de-coupling the modules.
MODEL:It cane be used to store the database objects.
VIEW: It can be used to view purpose,to giving the user 
input.
CONTROLLER:It is the main component in the MVC 
pattern,which can handle request and response mechanism.

MVC stands for model view controller.If you take a Struts 
web application then view consists of JSP . Its only to 
show the client the view part not any other part. The 
Controller will the action Servlet. Action Servlet 
basically controlls the request from the view part and 
calls respective Action class for business logic processing 
and fetching data from the database.The model part consists 
of Action class and helper class. It purely consists of the 
business logic as well as the interface to access the 
layer. The advantage of this pattern is Loose coupling. 
Lets say you want to add the text field in JSP. That will 
not required to change your Action class or Action Servlet.