Portfolios and ePortfolios are tools for storing, organizing, reflecting on, and sharing items that represent your learning. You can include items such as documents, graphics, audio files, videos, presentations, and course work to demonstrate your improvement or mastery in certain areas.
You can control what items you want to include in your portfolio, how they are organized, and who you want to share them with. When you share items with your peers, mentors, or potential employers, you can give them permission to view items, edit items, see or add comments, and see or add assessments to receive feedback.
-- From the D2L documentation