Activation system for work machine, activation method for work machine, and work machine

A work machine comprising:

• a power source;
• work equipment driven by the power source;
• an operation lever configured to operate the work equipment;
• a monitor;
• and
• a processor configured to:
• realize a predetermined additional function;
• receive confirmation history information indicating an operator who has confirmed a precaution related to the predetermined additional function from a server device;
• and
• control to display the precaution on a monitor in a case in which an operator who operates the work machine is not included in the received confirmation history information, and not to display the precaution on the monitor in a case in which an operator who operates the work machine is included in the received confirmation history information.