diff --git a/doc/source/index.rst b/doc/source/index.rst
index 0db8e9e..15a911c 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -1,8 +1,12 @@
 Application Service Mesh
 ========================
 
+Application Service Mesh (ASM) is a service mesh platform based on Istio. It seamlessly interconnects with Cloud Container Engine (CCE), an enterprise-grade Kubernetes cluster service. With better usability, reliability, and visualization, ASM provides you with out-of-the-box features and enhanced user experience.
+
 .. directive_wrapper::
    :class: container-sbv
 
    .. service_card::
-      :service_type: asm
\ No newline at end of file
+      :service_type: asm
+      :environment: internal
+      :umn: This document describes basic concepts, functions, key terms, best practices and FAQs of the Application Service Mesh (ASM) service and provides instructions for Grayscale Release of Application Service Mesh service.