What is the use of zero error necessary in a measuring instrument?

Zero error is the discrepancy that occurs when a measuring instrument does not read zero when it should. It is crucial to identify and correct zero error to ensure accurate measurements. If left unaddressed, zero error can lead to systematic inaccuracies in measurements, affecting the reliability of data collected from the instrument. By calibrating the instrument to account for zero error, users can achieve more precise and consistent results.