What are cookies?
A cookie is a small text file sent by a website and stored by the browser on a user’s computer so that the website can consult previous browsing activity by the user (Wikipedia).
More about cookies:
Technical explanation about cookies.
Blocking and Deleting Cookies
In general, browsers have various cookie configuration options that allow for various levels of privacy to be set so that, for example, all cookies that may be sent by a website such as this one are blocked or even so that all cookies that may have been stored are deleted. In order to change these settings, you can consult the Help section of the browser you use or request further information from its developers.
In the event that a user restricts or blocks any or all of the cookies from this website, it is possible that some of the features or services provided by the website will not be available.