Google Analytics is a powerful tool that tracks and analyzes website traffic for informed marketing decisions.
NameDescriptionDuration
_gac_Contains information related to marketing campaigns of the user. These are shared with Google AdWords / Google Ads when the Google Ads and Google Analytics accounts are linked together.90 days
__utmaID used to identify users and sessions2 years after last activity
__utmtUsed to monitor number of Google Analytics server requests10 minutes
__utmbUsed to distinguish new sessions and visits. This cookie is set when the GA.js javascript library is loaded and there is no existing __utmb cookie. The cookie is updated every time data is sent to the Google Analytics server.30 minutes after last activity
__utmcUsed only with old Urchin versions of Google Analytics and not with GA.js. Was used to distinguish between new sessions and visits at the end of a session.End of session (browser)
__utmzContains information about the traffic source or campaign that directed user to the website. The cookie is set when the GA.js javascript is loaded and updated when data is sent to the Google Anaytics server6 months after last activity
__utmvContains custom information set by the web developer via the _setCustomVar method in Google Analytics. This cookie is updated every time new data is sent to the Google Analytics server.2 years after last activity
__utmxUsed to determine whether a user is included in an A / B or Multivariate test.18 months
_gaID used to identify users2 years
_galiUsed by Google Analytics to determine which links on a page are being clicked30 seconds
_ga_ID used to identify users2 years
_gidID used to identify users for 24 hours after last activity24 hours
_gatUsed to monitor number of Google Analytics server requests when using Google Tag Manager1 minute
