A portfolio is a document that provides a summative report of a period of time in one's career, including what was done, why, how, to whom, when and where, and the impact. It allows one to take control of interpreting their own performance and stimulating reflection on growth areas. A portfolio introduces the creator, provides evidence of abilities and growth, and describes future plans. It is important to choose what to include, exclude, and how to arrange and interpret the portfolio for different audiences. Portfolios can take physical forms like binders or electronic forms like websites or PDF documents.