Juror's duty refers to the legal obligation of jurors to impartially evaluate the evidence presented during a trial and render a verdict based solely on that evidence and the law as instructed by the judge. This responsibility is crucial for ensuring a fair trial, as it upholds the integrity of the judicial process and protects the rights of both parties involved in the case. Jurors must also keep deliberations confidential and avoid outside influences, which further emphasizes their commitment to impartiality.