The "Distribution Tail" refers to the part of a probability distribution that represents extreme values, either high or low. In statistics, distributions like the normal distribution have tails that extend infinitely in both directions, indicating the likelihood of observing rare events. These tails are crucial for understanding the behavior of data, especially in fields like finance and risk management. In practical terms, the tails can help identify outliers or unusual occurrences. For example, in a financial market, a long right tail might indicate the potential for significant gains, while a long left tail could signal the risk of substantial losses. Understanding these tails aids in better decision-making.