Why You Should Write About Accomplishments Instead of Duties
One of the most unfortunate and unprofessional mistakes job candidates make is writing an inadequate description of their work experience. Phrases that begin with "I was responsible for..." and "My main duties..." are a sure way to get your job application rejected.
Avoid making the mistake of merely listing duties which state only which tasks your previous positions encompassed. Step it up by showing what you accomplished at those jobs.
In short, a duty describes what you did, while an accomplishment represents how well you did it. You should only list a duty when you can prove how good you were at it.