Why does an umpire carry pencils and papers to the ground?

Why does an umpire carry pencils and papers to the ground?

Paper and pencil are an important part of the equipment that an umpire carries to the field. The main use is to make notes on the bowlers, the batsmen, the number of balls, etc at an interval. They are also needed to make notes of points to be discussed later with scorers or in rare cases to send notes to scorers. When umpiring for matches in which there is a restriction on the number of overs per bowler, the umpire needs the paper and pencil to record these overs