Look on the Web for related information, and post whatever interesting discoveries you make on the conference. The most important ideas you take from this course may involve how you improved your skills to learn, and the nature of your learning experience. What you learn about a topic early in the course will be only part of what you will know about the same topic later in the course. Mundane, or thoughless posting will NOT improve your grade. They create a junk-mail traffic clutter in everyone else's mailbox.
Some questions ask more about relationships or implications.
Other questions will require answers that are more factual or will require solutions to problems. You need to recognize what is asked, and answer accordingly. They usually are available the following day after a class.