How do you prevent the Creation of a Session in a JSP Page and

Question :How do you prevent the Creation of a Session in a JSP Page and
why? (JSP)

Answer :By default, a JSP page will automatically create a session for the request
if one does not exist. However, sessions consume resources and if it is not
necessary to maintain a session, one should not be created. For example,
a marketing campaign may suggest the reader visit a web page for more
information. If it is anticipated that a lot of traffic will hit that page, you
may want to optimize the load on the machine by not creating useless
sessions.
The page directive is used to prevent a JSP page from automatically
creating a session:
<%@ page session="false">