# Group long-tail values[¶](https://doc.dataiku.com/dss/latest/preparation/processors/long-tail.html#group-long-tail-values "Permalink to this headline")

This processor merges together all values of a column that are not part of an allow-list of values that should not be merged.

## Use case[¶](https://doc.dataiku.com/dss/latest/preparation/processors/long-tail.html#use-case "Permalink to this headline")

The main use case of this processor is to merge all values of a column except the most frequent ones. The merged values are replaced by a generic ‘Others’ value.
