how to play the king's knight gambit

e4 e5 f4 fxf4 and nf3 the king's knight gambit sometimes it can lead to aggressive positions. White will have a big attack on the f7 pawn if you play very aggressive as white you might win the game. But if you are black and you play very careful and white plays incorrectly and not very aggressive black might be able to hold the position, but you never know if you will win or lose or draw. Just as black be careful but for white the opposite by being aggressive.