On a paper flashcard you would typically write the question on the front and the answer on the back of the card.
With Flashcard Hero, you write the question at the top of the card and the answer at the bottom. This lets you see both at the same time while your write your cards.
When you study your cards, the bottom half (i.e. the question part) will initially be covered so that you can try to recall the answer before seeing it.