Movement makes people look. It's mysterious. Maybe even exciting. Kind of like going on a scavenger hunt. Even if you know exactly where you're going and what you're looking for, there are bound to be some surprises along the way!
That's why it's great to have visuals with a lot of movement in them. Especially if the topic is not so exciting. An energetic visual with a strong sense of movement will keep people interested. And their eye will naturally travel around the whole page. That means they're much more likely to take in all of your great information.
Cartoonists often use what they call "action lines". That's how they create the sense of movement in a still picture. And it works! Just look at the word "merry" in the visual above. It look like it's moving, thanks to those action lines!