Responsiveness

Definition

How well a design adapts to different screen sizes.

In practice

Used to ensure usabilityglossary×UsabilityUsability is how easy and efficient it is for users to complete tasks within a product. It focuses on clarity, simplicity, and reducing effort so users can achieve their goals without confusion or friction.Open glossary term→ across devices.

The reality

If it breaks on mobile, it fails.

Plain English

It is whether the design still works properly on different screens.