Name	Description	Duration
comment_author	Used to track the user across multiple sessions.	Session
comment_author_email	Used to track the user across multiple sessions.	Session
comment_author_url	Used to track the user across multiple sessions.	Session

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Name	Description	Duration
_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
__utma	ID used to identify users and sessions	2 years after last activity
__utmt	Used to monitor number of Google Analytics server requests	10 minutes
__utmb	Used 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
__utmc	Used 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)
__utmz	Contains 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 server	6 months after last activity
__utmv	Contains 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
__utmx	Used to determine whether a user is included in an A / B or Multivariate test.	18 months
_ga	ID used to identify users	2 years
_gali	Used by Google Analytics to determine which links on a page are being clicked	30 seconds
_ga_	ID used to identify users	2 years
_gid	ID used to identify users for 24 hours after last activity	24 hours
_gat	Used to monitor number of Google Analytics server requests when using Google Tag Manager	1 minute