diff --git a/config/config.sample.php b/config/config.sample.php
index 4497a244aad..9a090326ea1 100644
--- a/config/config.sample.php
+++ b/config/config.sample.php
@@ -723,7 +723,9 @@ $CONFIG = [
 
 /**
  * Check if Nextcloud is up-to-date and shows a notification if a new version is
- * available.
+ * available. It sends current version, php version, installation and last update
+ * time and release channel to the updater server which responds with the latest
+ * available version based on those metrics.
  *
  * Defaults to ``true``
  */