You finish solving the corners with Move 4. This move flips 3 corners but doesn’t change the left-front corner, so I call it the “no change” (NC) corner. The move usually needs to be done 2 or 3 times.

The Setup

If no corners are solved, start Move 4 with the top color (white) on the leftside of the “no change” corner. (Think “none left”).

If 1 corner is solved, start Move 4 with the solved corner in the no change position.

If 2 corners are solved, start Move 4 with the top color on the front face of the no change corner. (Think “too forward.”) This leaves you with 1 solved corner, so you’ll need to do the move 1 or 2 more times.
Move 4
Are | you | really back? | You | are! | You too | are back, | you too! |
You’ve got this figured out don’t you? Amazing! Well friend, just one more step and will have solved the Rubik’s Cube. Let’s do it by going to the last step.