Cover letters are sent with your resume as either an attachment or an email. While not all jobs require a cover letter it is better to include one if you aren’t sure. The more senior the position, the more likely a cover letter is expected.
You can use a similar letter for all your applications with customized content to match the job posting, keywords, and the company. It doesn’t need to belong, but it should do three things:
The most important thing you can do in the cover letter is to sell yourself. Do some research about the company and use an example or two to demonstrate that you are the right person for the job.
Want to Know More? Read these articles about writing cover letters: