diff --git a/Cloud-Monitoring.md b/Cloud-Monitoring.md
index 874cdf0..a4ae021 100644
--- a/Cloud-Monitoring.md
+++ b/Cloud-Monitoring.md
@@ -1,10 +1,19 @@
-Seaweed Cloud Monitoring is a service provided by seaweedfs.com. It is an attempt to help SeaweedFS to grow organically. 
+Seaweed Cloud Monitoring is a service provided by seaweedfs.com. It is an attempt to help SeaweedFS to grow organically, to iterate faster without constant upgrading, and help SeaweedFS admin to better manage the clusters.
 
-Currently it has very basic features and all in beta. Later it may charge fees to access it.
+# Architecture
+
+```
+  Browser => Seaweed Cloud <==> Seaweed Agent <==> SeaweedFS cluster
+```
+The Seaweed Agent is a simple docker image `chrislusf/seaweed_agent`. It subscribes to metadata changes from a SeaweedFS cluster, and build up statistics.
+
+## Features
+Currently it has very basic features and all in beta. 
 
 Existing features:
 * Near real time directory statistics on disk usage, file count and directory count.
 * Set quota for any directory.
+* Automatically delete empty folders in any buckets under `/buckets`.
 
 ![](CloudMonitoring.png)