A skewer is a long pin that is pushed through pieces of food. You probably know it from barbecueing. Chess also has skewers. Skewers are attacks that go right through pieces.
Skewers and pins are very similar. A skewer is like a pin turned the other way around. In a pin, the piece of greater value is behind a piece of lesser value. In a skewer, the more valuable piece is in front of the lesser piece.
Often, the skewered piece is the king. The king is checked and must move. The target is the piece behind the king. If that is unprotected, it will be captured.
If the skewered piece is worth more than its attacker, the piece behind is lost. A rook will flee from a bishop. Then, the bishop will take the piece further on the diagonal.
To spot a skewer or a pin, you have to be aware of pieces that are lined up along a rank, a file or a diagonal.
What do you have to do?
Carry out a skewer and win material.