A handle or transaction identifier, or other token of agreement between co-operating programs. Cookies were introduced by Netscape to preserve state information on the browser. This permits a site to recognize you on subsequent visits. Shopping cart programs can record each item you have collected as you navigate through a site. When done shopping, the Web page can use all of your accumulated cookies to calculate the charge. Some people believe that any site you connect to can read all the cookies on your disk. However, only the site that issued the cookie can read it.
A cookie is a small packet of information that gets stored on your computer when you visit certain web sites. It might be information about who you are, what pages you looked at, or what searches you did. When you go back to those web sites, the computers running them can look at the cookie and remember you-- maybe even greet you by name.
A small piece of data that is stored on your computer and sent over the Internet to the web site with which it is associated. They allow a website to keep track of information from one visit to the next and across pages. Most web browsers have cookies enabled by default.