Bias refers to a tendency or inclination to favor or disfavor a particular perspective, group, or outcome, often in a way that is unfair or unjust. Bias can manifest in various forms, such as cognitive biases, which affect individual judgment and decision-making, or systemic biases, which influence societal structures and institutions. Bias can be conscious or unconscious and often results in skewed interpretations or decisions that do not reflect objective reality or fairness.