This is when the batsman runs to the opposite stumps to score a single run. The number of times this action is completed after one shot determines how many runs are scored.
The term 'rotating the strike' is used when batsman do this in a game to take pressure off themselves, and these drills will ensure your players are prepared for this.
Key to the success of running between the wickets is how well the batsman's fellow batter 'backs-up'. This is when the non-striking batsman walks out of their crease after the bowler has released the ball to give them less distance to run to the opposite stump.