A HTTP cookie is a little data-piece which is send from a website and stored in the web browser of the user while he is browsing that site. The HTTP cookie is also called cookie, web cookie or browser cookie. Each time the user is loading the website, the browser sends the cookie to the server to inform the website of the user's last activity. Some of these cookies are necessary because otherwise the site is unable to function properly. Other cookies are favorable for the user: they relate your username and password safety as well as for example your language preferences. With cookies you do not have to fill out the same information every time you visit a website.
Every browser gives you the possibility to deactivate cookies, on a very easy way. To find out more you can check the menu of the browser. Please note that if you deactivate cookies, your personal data, such as user name and password, won't be stored longer.
Individual non-technical third-party cookies can be deactivated and / or deleted by the user, such as explained on the website of the European Interactive Digital Advertising Alliance: www.youronlinechoices.eu.