You might be wondering how MAE differs from the more familiar RMSE. In cases where the error is evenly distributed across the dataset, RMSE and MAE will be equal. In cases where there are very large outliers in a dataset, RMSE will be much larger than MAE. Your choice of cost function should be appropriate to your use case. In regard to interpretability, MAE is more interpretable than RMSE as it's the actual average error.