You will be surprised to know …
…that one task that every successful orator does has nothing to do with prep of content and delivery.
It is the strong ability to work up the room!
A great public speaker has to infuse energy and enthusiasm in an audience, sometimes working harder to overcome the boredom leftover from the previous talk. Simple exercises like shaking a leg to a popular number, activities, games, small quizzes, and clever jokes are all very helpful to amp up the energy in the room.
Here is the video: