In the end black cannot reduce white liberties to one, and the ladder fails. The result is bad for black. Blacks stones are weak, and no white stone is captured. White can expect to attack or capture some of the black stones.
White cannot play to A, because white stone would not have liberties. Also white cannot play to B, because again white stone would not have liberties. So white cannot start killing at all.
If black tries to continue the attack, white can play as in diagram. This lets white to capture a stone from either of the marked positions next. White move could as well be in A or B.
Making or preventing two eyes can get very difficult. When learning it is good to play out any unclear situations. Reading out all positions can be difficult.