What is the difference between session and cookies?
Cookies persist on your local computer, they are small text
files that are stored there by websites and web applications that
contain some basic information about you as a user.
Sessions are application specific and persist only as long as
you are actively engaged with a particular web site. For instance
if you leave Amazon.com open do some shopping, then close the web
browser before making any purchases, your session has ended,
however the cookie that identifies your username still exists on
your local computer.