How to make an event "popular"

Hey gang, me again :slight_smile:

OK, so... what I'm trying to achieve is to make an event featured (or "sticky", like with posts). The intent is, to have a calendar page on left, with widget(sidebar) on right, with the "Most Popular Events" widget.

I managed to do this in a way, but how does events+ determine what is popular or not? I would prefer to have some control over this, because I want to have a space where I can promote an event.

Thank you again,