diff --git a/eds_scikit/utils/sort_first_koalas.py b/eds_scikit/utils/sort_first_koalas.py
index 26414fa9..52508f45 100644
--- a/eds_scikit/utils/sort_first_koalas.py
+++ b/eds_scikit/utils/sort_first_koalas.py
@@ -6,9 +6,9 @@
 def sort_values_first_koalas(
     dataframe: DataFrame, by_cols: List[str], cols: List[str], ascending: bool = True
 ) -> DataFrame:
-    """Replacement for dataframe.sort_values(cols).groupby(by_cols).first()
+    """Use this function to obtain in koalas the same ouput as dataframe.sort_values(cols).groupby(by_cols).first() in pandas.
 
-    To get a deterministic first, provide an id column of your dataframe as the last element of cols.
+    If you want the output to be deterministic, provide an id column of your dataframe as the last element of variable cols.
 
     Parameters
     ----------