The phrase "to impress the employer" means to do something that will make a good impression on your boss or potential employer in order to gain their favor, demonstrate your skills and qualifications, and increase your chances of being hired. This could involve dressing professionally for an interview, arriving early, having well-prepared answers to common interview questions, showcasing relevant work experience or education, and expressing enthusiasm and interest in the position. The goal is to make a positive impression that will set you apart from other job candidates and increase your chances of being hired.