-Specifies the maximum allowed depth of interaction terms. ***0*** means that interactions are not allowed. This hyperparameter should be tuned. Please note that occasionally a too high value produces a model that performs poorly on an independent test set despite looking good when tuning hyperparameters, typically because of a few outlier predictions. If this happens then capping of predictors or predictions should be considered. Alternatively, ***max_interaction_level*** may be decreased until the problem disappears.
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