Density

Real World Example

Imagine trying to pack a suitcase for a vacation and realizing you have too many clothes to fit in. Much like how you need to decide which items are essential to take based on how much space they occupy, density describes how much mass is packed into a given volume of an object. In this analogy, the suitcase represents the volume, the clothes are the mass, and the more clothes you can fit into the suitcase without exceeding its capacity, the higher the density of your packing effort.