A digital portfolio is a collection of student work selected purposefully to demonstrate learning over time. It can be organized and shared using different digital formats like web pages, PowerPoint, or word documents. Digital portfolios have advantages like taking up minimal storage space, allowing for easy sharing and backups, and enabling multimedia and hyperlinks. They motivate students by allowing reflection on strengths and goals. Effective digital portfolios include a variety of student work like essays, projects, and reflections.