Decision-making errors occur when individuals or groups make choices that lead to undesirable outcomes. These mistakes can stem from various factors, such as cognitive biases, lack of information, or emotional influences. For example, the confirmation bias leads people to favor information that supports their existing beliefs while ignoring contradictory evidence, which can result in poor decisions. Another common error is overconfidence, where individuals overestimate their knowledge or abilities. This can lead to taking unnecessary risks or dismissing valuable advice. Recognizing these errors is crucial for improving decision-making skills and achieving better results in both personal and professional contexts.