What does a large MAD tell you?

A large Mean Absolute Deviation (MAD) indicates that the data points are spread out widely from the mean, suggesting significant variability or dispersion in the dataset. This can imply that there are substantial differences among the observations, which may affect the reliability of the mean as a central measure. A high MAD can also signal the presence of outliers or extreme values influencing the data. Therefore, it suggests a less consistent or more unpredictable dataset.