Why does the bowlers end umpire move to a side if the ball is hit into the field?

Why does the bowlers end umpire move to a side if the ball is hit into the field?


When the ball goes out into the field, the bowler’s end umpire must be ready to move very quickly to a position on a side to the creases to observe carefully:


the completion of each run
to see if the wicket is put down fairly
what is happening to the ball in the field and
when the batsmen cross


To see all this action, the umpire should move to a position far enough from the stumps to see the wicket and the popping crease at the same time.