There was a time when all books were printed, and the main use of type was either for text or display. Today, we have added one word that modifies how we read and how we design typefaces: text or display, and where? The nature of ink, paper and the pressure needed to imprint the former onto the latter is very different from the nature of the light emitted from a glowing screen.
Another qualifier quickly presents itself: and in which country? There are regional variations in typographic trends and visual language. Some typefaces are meant to be universal in appeal, and some dedicated to particular regions. Knowing where it will come to life will help you to design a more robust typeface.