It allows you to store all your favorite sites in one place, and categorize them, like your bookmarks/favorites, but it can be accessed from any computer.

I used it recently for a research project my kids did on ancient civilizations. Since there is so much out there, and not all of it's kid friendly, I looked at the sites first and then put them on my portaportal. Then the kids could go right to the sites, and they could access it from home as well.

I also put up author sites, teaching resources for me, and sites for our current project. If anyone wants to see mine, shoot me an FM- my guest access is my last name and I don't want to post it.