A cookie is a piece of text which helps analyse web traffic or logs when you visit a particular site. Cookies allow web applications to respond to you as an individual. The web application can tailor its operations to your needs, likes and dislikes. It does this by gathering and remembering information about your preferences.
The Help menu on the menu bar of most browsers will tell you how to prevent your browser from accepting new cookies. It will also tell you how to have the browser notify you when you receive a new cookie. Also how to disable cookies altogether. However, cookies allow you to take full advantage of some of our web sites’ most useful features and we recommend that you leave them turned on.