What is what does struck out the side mean?

"Struck out the side" is a baseball term used to describe a pitcher who has retired all three batters in an inning by striking them out. This is considered a dominant performance and a significant achievement for a pitcher. The phrase "struck out the side" is often used as an indicator of the pitcher's skill and can be an exciting moment for fans watching the game. In order to strike out the side, the pitcher must throw three consecutive strikes or force the batter to make three outs without putting the ball in play.