Passed pawns and promotion: a common chess weakness
Push your passed pawn home for a new queen
A passed pawn with no enemy pawn blocking it on the file or the two files beside it. Promote it. Most endgame wins come from a single passed pawn shepherded home.
vs game: a connected pair of passed pawns on the queenside. Stopped pushing, blockaded, draw agreed.
vs puzzle: a passed pawn one square from promotion, the right sacrifice clears the path.