Necessary for keeping user logged in...an experiment and the expiry of experiments a user has been included in _opt_expid .google.com..gaexp Google LLC .google.com 3 months Used by Google Optimize to determine a user's inclusion in..Description auth .join.com Session Used to remember tokens of authenticated user, while user is logged in..year User Attributes sent through the Hotjar Identify API are cached for the duration of the session in