Cookies differ according to the purposes for which they are used, and are divided into two macro categories: technical cookies and profile cookies.
Technical cookies are only used to ”transmit a communication in a digital communications network, or to the extent strictly necessary for the provision of a service by the company of information expressly requested by the subscriber or user to receive the service”.
The profile cookies create user profiles and are used to send advertising messages pinpointed to the user’s preferences which are shown while browsing the web. Given the intrusive nature of these cookies into the user’s private life, European and Italian law requires that the user be adequately informed about their use and consequently express their consent or otherwise.
Third party cookies
To correctly define the question the further element of subjectivity has to be considered. i.e. consider the other subjects who install cookies in the user’s computer, whether it is the manager of the site the user is visiting (that can be briefly referred to as the “editor”) or a different site that installs cookies through the former site (so-called “third parties”).
Barring the above about cookies that are strictly required for browsing purposes, the user can delete the other cookies through their browser.
Each browser has different procedures for settings management.