Why animation on your website does more than you think

Most websites move too much or too little. A carousel that automatically slides, a button that pulses for no reason, a video that plays immediately: they are all examples of movement that distracts the visitor instead of guiding them. Movement only works when you use it with one goal: to lead your visitor's attention to the next relevant element.

Think of a form that calmly slides into view when someone reaches the section, or a button that subtly responds when the cursor hovers over it. These are signals that say: something is happening here, you can do something here. Your visitor doesn't have to think about where to look; the design does that work.

The difference is in intention. Decorative animations fill space. Functional animations guide an action. For every moving element you add, choose the second category, and scrap the rest.

Movement is powerful, but not every visitor tolerates it equally well. Some people get nauseous from parallax effects or large shifts on the screen. Fortunately, there is a fair solution for that: the prefers-reduced-motion setting, with which your visitor's operating system indicates that they want less movement. If you respect that setting, your site automatically switches back to a calm variant without loss of functionality.

Performance is directly related to that. An animation that is recalculated via JavaScript at every scroll position devours computing power and causes stutters on older phones. Use CSS transitions and transformations where possible, and keep the number of simultaneously moving elements low. A smooth animation on a fast site contributes to your brand; a stuttering animation does the opposite.

So test your site not only on your own laptop, but also on a midrange phone with a mediocre connection. What runs smoothly there runs smoothly everywhere.