Definition of draw
A draw (also called draw) is an incomplete hand that can be improved. For example, if you have 7-8 in your hand on 5-6-x, you have a draw on the straight, meaning you are one card away from making a straight. The draws are numerous. You can have a draw to the flush if you have, for example, 5-9 of spades on 2-2-3 with two spades. You can have a draw gutshot with 7-8 on 5-9-2 for example. The draw gutshot is a draw that is not open. 7-8 out of 5-6 is open because the 9 or the 5 will give the straight. The draw gutshot presented here can only be helped by a 6.
Play your draws aggressively
When you have a draw, you'll have to play it aggressively to make it pay off. If you have a draw with say 7-8 out of 5-6-2, rather than just call your opponent's bet, why not play a check-raise or raise instead? That way, if you hit your card, you'll win a bigger pot and you'll be a harder opponent to play against. And on top of that, you'll make your opponent fold to win an uncontested pot.