A job is a regular activity performed in exchange for payment. A person usually begins a job by becoming an employee, volunteering, or starting a business. The duration A job is a regular activity performed in exchange for payment. A person usually begins a job by becoming an employee, volunteering, or starting a business. The duration A job is a regular activity performed in exchange for payment. A person usually begins a job by becoming an employee, volunteering, or starting a business. The duration