It's a way to keep track of your work during your academic carreer so that you may showcase what you've accomplished.
Why utilize an ePortfolio?
Keep track, showcase, and document all the work you've been doing in college in a meaningful way. If you don't, you may even forget all the amazing projects, outreach, and creative work you've completed during your college career. Potential employers would much rather see your actual work than a three digit number or letter grade.
How do I create an ePortfolio?
How to create an ePortfolio: seven ways to create your own ePortfolio by Information week
Free ePortfolio Websites: list of free DIY website and portfolio creation applications (list provided by Goshen College)
More about ePortfolios:
ePortfolio gallery: Great examples made by students at Clemson
More great info about ePortfolios: the what, how, why, and special considerations (by Old Dominion University)