A portfolio can be done in many different formats, depending on its purpose. For artists, photographers, writers, and other creative types, it's usually a collection of their works. For marketing executives, it could be copies of their marketing brochures and ad campaigns. For project managers, it may be the steps involved in developing a project, from concept to final outcome. Whatever you choose to put in your portfolio, it should show the employer what you are capable of.
Most employers prefer outlines, diagrams, flow charts, etc.
They are easier to read and the concept can be grasped in a couple seconds. So, you know what you're interested in, and you've prepared your resume. Depending on what type of field you are looking into, employers will ask certain questions about your background and experience. It is crucial that you're prepared for the types of questions that will be asked, and the manner in which you should answer them. The final stage of this process is the learning of various job-searching strategies.