These are shared with Google AdWords / Google Ads when the Google Ads and Google Analytics accounts are linked together. The cookie is updated every time data is sent to the Google Analytics server. 30 minutes after last activity policies.google.com__utmc Used only with old Urchin versions of Google Analytics and not with GA.js. This cookie is updated every time new data is sent to the Google Analytics server. 2 years after last activity policies.google.com__utmx Used to determine whether a user is included in an A / B or Multivariate test.