What is a double double in baseball?

A double-double in baseball refers to a batter hitting two doubles in a single game. A double is when a hitter hits the ball into play and reaches second base before being tagged out. Hitting two doubles in one game is considered a rare feat, and it typically signifies a strong performance by the batter. Double-doubles are important for the team's offense as they significantly improve the chances of scoring runs and winning the game.