Bat speed refers to how quickly a baseball bat moves through the air during a swing. It is a crucial factor in hitting, as faster bat speed can lead to better contact with the ball and increased distance on hits. Players often work on improving their bat speed through various drills and exercises. Factors that influence bat speed include a player's strength, technique, and the weight of the bat. Using a lighter bat can help some players achieve higher speeds, while others may benefit from strength training. Coaches often measure bat speed to assess a player's performance and potential for improvement.