input: [Cookie] Google Analytics [Name] __utmv [More Information] Find out more [Purpose] 
output: This cookie is not normally present in a default configuration of the tracking code. The __utmv cookie passes the information provided via the_setVar() method, which you use to create a custom user segment. This string is then passed to the Analytics servers in the GIF request URL via the utmcc parameter. This cookie is only written if you have added the _setVar() method for the tracking code on your website page.