Kurtosis is a statistical measure used to describe the distribution or skewness of data around the mean. There are three main types of kurtosis: mesokurtic, leptokurtic, and platykurtic. Mesokurtic data resembles a normal bell curve but with slightly fatter tails and a lower peak. Leptokurtic distributions have extremely thick tails and a very thin, tall peak. Platykurtic distributions have slender tails and a smaller, broader peak than mesokurtic distributions.