What are the duties of a Firewatch?

Could you elaborate on the primary responsibilities and tasks undertaken by an individual in the role of a Firewatch? What kind of training or qualifications are typically required for this position? Additionally, how crucial is the role of a Firewatch in ensuring the safety and well-being of individuals and property in a given area? Lastly, could you provide some insight into the working conditions and potential challenges that a Firewatch might encounter on the job?