The article discusses different types of normal distributions, like skew-normal and power lognormal distributions. It introduces the q-Gaussian distribution, which is similar to the normal distribution but can represent data with high peaks. By changing a parameter called q, the shape of the distribution can be altered. The generalised normal distribution is a family of distributions derived from the normal distribution by adding shape parameters in different ways. Increasing q above 1 makes the distribution flatter and reduces its peakiness.