When a borrower is able to draw against pre-paid funds.
Where the flop comes and you have a draw, perhaps a straight draw, but after the turn you may have more than one draw such as a straight or a flush.
After you get your initial draw, picking up another draw. For example, if you hold 8h3h and the flop comes Th9h2s, you have a flush draw. If the turn is the 7h, you have made your flush and picked up a straight flush redraw.
A way to further improve your hand after hitting a draw.
A draw to an even better hand when you currently hold the nuts.
Borrower is able to draw on pre-paid funds