A cookie is a text file stored as plain text on a user’s computer by a web browser. The cookie is sent by a website to a web browser and then sent back unchanged by the browser each time it accesses that website.
■ First party cookies: Set by the site you are visiting
■ Third party cookies: Set by partners of site you visit (e.g. sites which provide images to the current site)
■ Persistent cookies: Remain when you close the browser
■ Temporary cookies: Disappear when you close the browser
Cookies Used In Google Analytics
Cookies Type Function Duration
_utma Visitor Identifier Expires after 2 years
_utmb Session Identifier Expires after 30 minutes
_utmc Session Identifier Expires when you close browser
_utmz Campaign Values Expires after 6 months
_utmv Visitor Segmentation Expires after 2 years
_utma, _utmb and _utmc cookies are implemented by default within Google Analytics to track traffic.
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