The deliberate timing and order of several elements moving at once, arranged so a transition reads as one coordinated gesture rather than parts firing at random.
Choreograph the page load: the header settles first, the cards follow in a quick stagger, the rest arrives last.
Easing shapes one element’s motion; choreography arranges many. It is the difference between a room where everyone stands at once and a room where the eye is led, seat by seat. The tools are order, overlap, and delay: a stagger is its simplest sentence. Done well it goes unnoticed, felt only as composure; done badly it reads as a system that can’t decide what matters first.