According to Zety, a service that creates professional communication templates, you use a cover letter to accompany your resume when you’re applying to a specific job, and use a letter of interest to put yourself forward for a job that isn’t advertised. Essentially, you’re pitching yourself to a company of interest, telling them your qualifications,…
If you’re job hunting and you find a potential job where you only meet some of the requirements, go ahead and apply. Worst-case scenario, you don’t get the job. Best-scenario, you get hired—and find yourself in a position where you can grow.