There may be two types of used cookies:
Session cookies, are not stored on the user's computer, but are needed during each session of use in each web service, and are essential for the proper functioning of the service.
Cookies temporarily stored on the computer of the user, are used to make anonymous and aggregate statistical studies of the users use of the service, in order to make future enhancements and optimizations.
Users who do not wish to receive cookies can configure their browser with this option. It should be recalled that, on occasions, non-acceptance of the cookie may make it impossible to access, in whole or part, to the availability of the service. The user should consult the instructions and manuals of your browser for further information.