A cookie is defined in the English dictionary as “A packet of data sent by an Internet server to a browser, which is returned by the browser each time it subsequently accesses the same server, used to identify the user or track their access to the server”.
Most web browsers such as Google or Safari allow some control to restrict or block cookies in the browsers settings, but if the client disables some of the cookies it will affect the ability to use some of the features of the websites. For more information about cookies please visit www.aboutcookies.org
If you wish to stop allowing cookies on your computer, you can do this via the settings on your web browser. Check the 'Help' section on your browser which will assist with this.