It's hard to say how this could be best used without actually trying it first. The very first padlet I created could function as a whole-class, broken into competing groups, review of a distance learning program we've been using.
It could also be shared to each student, where they would have to post at least one answer or comment to all the "review" questions posed.
It could also be shared to each student, where they would have to post at least one answer or comment to all the "review" questions posed.