Write an application letter for a part-time or summer job in response to a specific ad and tailor your rsum for the job. Choose an organization related to your career goals. Identify the exact hours and calendar period during which you are free to work. Submit a copy of the ad along with your materials.

it can be anything.. its a job related ad

its like you've seen an ad posted somewhere and with reference to it you're applying for that job so you're writing a resume (can be any carreer and organization )