If you’re a designer, I’d like you to question the density of the interfaces you’re creating; if you’re not a designer, use the lens of UI density to understand the software you use. If the tradeoffs in visual and temporal density make the outcome more valuable - either by increasing submission rate or making the effort more worth the user’s time - then we’ve increased the overall value density. Finally, a concrete definition of UI density: UI density is the value a user gets from the interface divided by the time and space the interface occupies.

Source: UI Density