A cookie is a small text file that is stored on your computer when visiting a website. This text file stores information that can be read by the website when visiting it again at a later date. Some of these cookies are necessary because otherwise the site is unable to function properly. Other cookies are convenient for the visitor: they remember your username in a secure way as well as your language preferences, for example. Cookies mean that you do not need to fill out the same information each time you visit a website.
You can modify your browser to turn off cookies. This is very easy to do. Please note: if you disable cookies, your user name and password will no longer be stored on any website