Portfolio is a place where one include their best work to show off  .Portfolio page helps in Selection criteria for business services  . Here is A Slide that Covers almost all about What is Portfolio and why it requires  , Importance etc follow link http://www.slideshare.net/webdesigntips/what-is-portfolio-website-design

A portfolio is a place where one includes their best work to show it off. Portfolio pages help in the selection criteria for business services. Here is a slide that covers almost all about what a portfolio is and what it requires, including the importance, etc.