Comic Action is the loudest style here. The word punches in with a 3D shadow snapping behind it, a burst radiates outward, halftone dots pulse in the background, and the whole composition shakes and breathes on a loop.
Ten keyframes running concurrently — popIn, snapShadow, burst, shake, textPulse, colorCycle, bgPulse, rotateBg, shadowPulse, zoomBreathe. Layering that many independent cycles at different periods is what produces the constant motion; no single one of them carries the effect.
Not much — the busyness is the style. If you want pop-art colour without the shake, Color Burst gives you the palette with far less motion.