Information transferred from a website on your computer disk called “cookies”. These are not computer programs, even small information files that allow sites to store and use information about how a user visits.
There are several types of cookies: temporary cookies (or session cookies) are deleted when the browser to turn off; Persistent cookies are not deleted automatically, but will remain until they are deleted intentionally or until their expiry date (which depends on the validity of the site is programmed cookie).
Most browser is set to automatically accept cookies. You can disable cookies in your browser, but remember that in this case you can be denied for a number of functions needed to make a website work properly. For more detailed information about cookies visit www.aboutcookies.org site containing detailed and independent information on how to disable cookies in your browser settings and how to delete cookies already present in the computer.