ProPortal is what we call an eILP, which stands for electronic individual learning plan. What that means is its an online way you can check you progress against your learning targets. You will set your goals and targets for your course, alongside your tutor. Once you have identified your targets you can use ProPortal to track you progress against those targets.
It has a host of practical uses too. Your tutor will use it as a way to communicate with you, alert you of anything you need to know and remind you, if you are falling behind on anything. ProPortal also holds a lot of vital information about your course, from your timetable, when your next assignment or assessment is due. It will help you track your attendance and much, much more.
ProPortal is a central part to your life in College and will support you in ways that this short introduction can't cover. Your Tutor will take you through this in much more detail.