Summary: Usability refers to how easily people can complete tasks with a design. Improve it by watching representative users do realistic tasks, early and repeatedly.


This article replaces our original Usability 101, written by Jakob Nielsen in 2012 . The original remains available for historical reference.

What Is Usability

Usability refers to how easily people can successfully complete a task using an interface.

Usability has 5 important components:



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