How can a good resume help you get a job?

A resumes sole purpose is to get you in the door for a face-to-face interview.

you usually get 15-20 seconds of someone scanning your resume - not a lot of time to make a first impression so your resume better be easy to read, clear and concise

You need to focus on your achievements and responsibilities vs just listing your duties and responsibiltieis -- anyone can do that. What did you do better, faster, more efficiently that everyone else that is applying for the same job?

Resumes can also give a brief look on your work experience, skills as well as your personality and achievements. If you are making a resume make sure that you keep it short and simple, not too flashy.