A purpose of a job advertisement is to notify the public about an open job position.
The main goal of a job advertisement is to inform potential job candidates about a new opening and attract them to apply.
A basic structure of job advertisement is shown below in the image.
1) commander and chief of the American government 2) where the applicant is most likely to work. 3) a list of duties/ responsibilities 4) qualifications required. ie education/ experience 5) introduce America its government. Along with it include job benefits. 6) how the applicant can contact you.