A draw refers to a poker hand that is not made yet and lacks certain cards to complete a strong combination.
The best-known and most common draws in poker are flush draw and straight draw. For example, if you have two diamonds in your hand and there are two diamonds on the flop, this means you have a flush draw. If another diamond comes on the turn or river, you will complete your draw and make a flush, which is a very strong hand.
While there are a few types of straight draws, the most popular one is an open-ended straight draw, giving you eight outs to complete the hand. If you are holding JT on the 983 rainbow board, you have an open-ended straight draw because any 7 or Q will give you a straight and make your hand into the nuts.
Usually, it is best to play your draws aggressively since you can win the pot by making your opponent fold or by improving to a made hand.