A cookie is a small data record that is saved on your end device. These data records are produced and sent to you by the web server which you connected to using your web browser.
While you are active on a web page, a session cookie is temporarily stored in your computer’s memory. The session cookie is required for the full functionality of the website. When you click on "Continue" in forms, the connection with your previous entries is retained. The session cookie is stored until the end of your session.