diff --git a/mkdocs.yml b/mkdocs.yml
index 1058e705ee2..581ab2f0d75 100755
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -46,6 +46,7 @@ extra:
   analytics:
     provider: google
     property: UA-60523578-15
+  # branch represents code names (git clone). release represents version number used in texts.
   nebula:
     release: master
     nightly: nightly