A cookie is a little text file which the website you visit saves on your computer. There are two kinds of cookies. One kind saves a file on your computer for a long time. This is used, for example, for functions that tell you what is new since the user last visited that particular website. The other kind of cookie is called a session cookie. During the time you surf a site, this cookie is saved temporarily in the memory of your computer, for example to keep track of what language you have chosen. Session cookies are not stored for a long time on your computer, but disappear when you close your web browser.