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General purpose platform session cookie, used by sites written with Microsoft .NET based technologies. Used to maintain an anonymised user session by the server.
_ga 1 day
_gid up to 2 years
Used to distinguish unique users by assigning a randomly generated number as a client identifier. It is included in each page request in a site and used to calculate visitor, session and campaign data for the sites analytics reports.
Used to throttle the request rate - limiting the collection of data on high traffic sites.
Used by YouTube (Google) for storing user preferences, geographical GPS location and other unspecified purposes.