Cookies are information packets sent by web servers to web browsers, and stored by the web browsers.
The cc-cc website used two types of cookies. The first is Session cookies, these allow your login to persist as you move to different pages on the site. These cookies will be deleted from your computer when you close your browser.
The second is a persistent cookie which if you select the 'remember me' tick box on the log in page will record a token on your computer, this will expire after 7 days after which you will need to log in again.