ScreenSmart = for small font sizes:
ScreenSmart fonts are specifically built for the screen, to perform at sizes from 9–18 pixels. Their forms are adapted to anticipate the effects of coarse pixel grids, and their styles are adjusted to ensure that each weight is appreciably different from the other members of the family. On Windows, where other webfonts are at their weakest, ScreenSmart fonts contain additional engineering that helps them render with special clarity and precision. For best results across all platforms, always use ScreenSmart fonts when setting text at small sizes.
I believe I don’t use screensmart here because I only use Gotham Rounded for large text like titles and the logo.