Just listen to any random piece of music, whether that’s Beethoven, David Guetta or Rage Against the Machine (RATM). Of course, tastes differ, but every piece of music, no matter the genre, has a structure.
To the casual listener, Killing in the Name is just a loud rock song. But when you analyse it, you see that RATM are in fact playing with tone, pace and style. At the end, you know you’ve listened to something that has a certain cohesion, yet there’s strong variation within it as well.
And that’s how a good moderator approaches their role: bringing rhythm and variety to a meeting or event.