diff --git a/gdown/download.py b/gdown/download.py
index 548922e..aec50ac 100644
--- a/gdown/download.py
+++ b/gdown/download.py
@@ -120,7 +120,9 @@ def download(
     url: str
         URL. Google Drive URL is also supported.
     output: str
-        Output filename. Default is basename of URL.
+        Output filename/directory. Default is basename of URL.
+        If output ends with separator '/' basename will be kept and the 
+        parameter will be treated as parenting directory. 
     quiet: bool
         Suppress terminal output. Default is False.
     proxy: str