Positive skew, also known as right skew, occurs in a distribution where most values are concentrated on the left side, with a tail extending to the right. This means that while the majority of data points are lower, there are a few higher values that pull the average to the right. In a positively skewed distribution, the mean is typically greater than the median. For example, in income data, most people may earn lower salaries, but a few high earners can significantly raise the average income, illustrating the concept of positive skew in real-world scenarios.