diff --git a/pandas/core/generic.py b/pandas/core/generic.py
index e46fde1f59f16..aeec70bc392ff 100644
--- a/pandas/core/generic.py
+++ b/pandas/core/generic.py
@@ -5076,6 +5076,9 @@ def pipe(self, func, *args, **kwargs):
         -----
         `agg` is an alias for `aggregate`. Use the alias.
 
+        In pandas, agg, as most operations just ignores the missing values,
+        and returns the operation only considering the values that are present.
+
         A passed user-defined-function will be passed a Series for evaluation.
         {examples}"""
     )