Why do we use density instead of pixels? When designing an interface, it is recommended not
to design for pixels, but for the pixel density of the device. This way we ensure that our
elements are scaled properly to fit different device sizes. Thus, if we design a button asset, for
example, at 200 x 50 dp, it will be displayed at 200 x 50 px on a 160 ppi screen and at 400 x 100
px on a 320 ppi screen, i.e. at twice the size of the original asset.