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Pareto principle 0:37
A 37-second explainer of Pareto principle, narrated over the same demo you can try yourself.
Try the interactive Pareto principle demo
What this video covers
The Pareto principle suggests that roughly 80% of effects come from about 20% of causes - the 'vital few'. In UX, this often means a small set of features, flows, or fixes delivers most of the value. The exact split varies and it’s not a precise law; treat it as a prompt to find and prioritise the high-impact minority, not a formula. You can see this in action on this page.
You reached four-fifths of all usage by selecting just a couple of features out of ten. That lopsidedness is the Pareto principle, and it changes where you spend effort: the vital few deserve most of your craft, while the trivial many can wait - or go.
