Cookies are small text files installed by web sites on users’ PCs, by means of the browser, which record certain information regarding browsing; unless the cookies are disabled, these data are communicated to the site that installed them each time the user returns to it.
Session cookies, which are not saved permanently to the user’s computer, but deleted when the browser is closed, may thus be present. The reason for their presence is the need to transmit the necessary session identifiers to allow secure and efficient browsing of the site.
Use may also be made of persistent cookies, i.e. cookies that are saved on the computer’s hard disk until they expire or are deleted by the user.
Persistent cookies automatically recognise users each time they access the site.
Cookies can thus be used for the purpose of authentication, session tracking and saving specific information regarding users who access the servers.
In either case, you can configure your browser to prevent it from processing cookies, as follows: