Path is the path to the directory containing the Qube! distribution. Normally this distribution directory would be the one that contains the Supervisor daemon executable.
Note for Qube Worker hosts
This is a Worker startup parameter. Since this parameter is involved in the initial startup of the worker and affects the behavior of the worker before it contacts the supervisor to request a "remote" configuration from the central worker configuration file (see qbwrk.conf), it's considered a bootstrapping parameter and can only be specified in the worker's local qb.conf configuration file. Any mention in the global qbwrk.conf file will be ignored.
This is a complete list of the Worker bootstrap parameters