Jury Nullification is when a jury decides not to follow the law, and instead make their own decision about a case. It means that the jury finds the defendant not guilty, even though they may have broken the law. It happens when the jurors think that a person should not be charged or punished for something, like if the punishment is too harsh or if the law is unfair. So even though a person may be guilty of something, the jury can still find them not guilty if they think the person should not be punished for it.