When Website Animation Helps (and When It Hurts)

Animation on a website should answer the question "what does this movement tell the visitor?" A button that subtly lifts on hover communicates "this is interactive." A section that fades into view as you scroll communicates "here is new content." A loading spinner communicates "something is happening." If an animation does not communicate anything, it is visual noise.

Heavy things should move slowly. Light things should move quickly. Nothing should move in a perfectly straight line. These are the rules of natural physics that make animation feel organic rather than mechanical. When motion feels wrong, visitors cannot articulate why, but they feel uneasy.

Only one thing should animate at a time. When five elements bounce, slide, and fade simultaneously, none of them communicate anything. The visitor's eye has nowhere to land. Stagger your animations so each element gets a moment of attention before the next one enters.

Always respect the prefers-reduced-motion setting. Some visitors experience motion sickness or seizures from screen animation. When this setting is active, all animation should stop completely. The content must be fully visible and functional without any movement.