1 day HTTP Cookie _uetsid_exp Microsoft Contains the expiry-date for the cookie with corresponding name. Persistent HTML Local Storage _uetvid Microsoft Used to track visitors on multiple websites, in order to present relevant advertisement based on the visitor's preferences. Persistent HTML Local Storage _uetvid Microsoft Used to track visitors on multiple websites, in order to present relevant advertisement based on the visitor's preferences. 1 year HTTP Cookie _uetvid_exp Microsoft Contains the expiry-date for the cookie with corresponding name. Persistent HTML Local Storage IDE Google Used by Google DoubleClick to register and report the website user's actions after viewing or clicking one of the advertiser's ads with the purpose of measuring the efficacy of an ad and to present targeted ads to the user.