input: [Cookie Name] sessionid [Expiry] The length of the current session [Description] 
output: This ID is used by the website to identify you during your session. A lot of the time it isn't used at all, but if you decide to do something complex during your visit that isn't simply clicking a link to move from one page to another (such as filling out a form), the website uses this ID to identify you throughout the process to make sure it runs smoothly.