A cookie which cannot be eaten...

• A cookie is some information that a Web site puts on your hard disk so that it can remember something about you at a later time. More technically, it is some information for future use that is stored by the server on the client side.
  

  
  

• If a user requests a page from some site and the site sends not just a page, but also a cookie containing the date and time, then, when the user's browser gets the page, the browser also gets the cookie, which it stores in a folder on the user's hard disk.
  

  
  

• Later, if user requests a page from the same site again, and when the user enters the URL, the browser looks on the local hard disk for a cookie associated with the URL which user typed. If the cookie exists, the browser sends the cookie to requested site along with the requested page . In this way, the site will make use of cookie, and also tell when the user last visited the site.