A flag that indicates if caching is disabled.
The session key.
If product links were sent to friends, stores the timestamps in the format:
A poll ID that indicates if a vote has occurred.
Allows guests to edit their orders.
Distinguishes users and sessions.
Determines new sessions/visits.
Determines if the user was in a new session/visit.
Stores the traffic source or campaign that explains how the user reached your site.