diff --git a/docs/README.md b/docs/README.md
index 2117d57c44..8c13e4d2bd 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -1,6 +1,6 @@
 # Welcome
 
-**This is the official documentation of SkyWalking 9. Welcome to the SkyWalking community!**
+**This is the official documentation of SkyWalking 10. Welcome to the SkyWalking community!**
 
 Here you can learn all you need to know about **SkyWalking**'s architecture, understand how to deploy and use SkyWalking, and contribute to the project based on SkyWalking's contributing guidelines.
 
diff --git a/docs/en/concepts-and-designs/backend-overview.md b/docs/en/concepts-and-designs/backend-overview.md
index f65783791d..e054e74a10 100644
--- a/docs/en/concepts-and-designs/backend-overview.md
+++ b/docs/en/concepts-and-designs/backend-overview.md
@@ -1,11 +1,19 @@
 # Observability Analysis Platform
-SkyWalking OAP and UI provides dozens of features to support observability analysis for your services, cloud infrastructure, open-source components, and more.
 
-Besides those out-of-box features for monitoring, users could leverage the powerful and flexible analysis language to build their own analysis and visualization.
+SkyWalking OAP and UI provides dozens of features to support observability analysis for your services, cloud
+infrastructure, open-source components, and more.
+
+Besides those out-of-box features for monitoring, users could leverage the powerful and flexible analysis language to
+build their own analysis and visualization.
 
 There are 3 powerful and native language engines designed to analyze observability data from the above areas.
-1. [Observability Analysis Language](oal.md) processes native traces and service mesh data.
-1. [Meter Analysis Language](mal.md) is responsible for metrics calculation for native meter data, and adopts a stable and widely used metrics system, such as Prometheus and OpenTelemetry.
-1. [Log Analysis Language](lal.md) focuses on log contents and collaborate with Meter Analysis Language.
 
-SkyWalking community is willing to accept your monitoring extension powered by these languages, if the monitoring is public and general usable.
+1. [Observability Analysis Language](oal.md) processes native traces and service mesh data to build metrics of entity
+   and topology map.
+1. [Meter Analysis Language](mal.md) is responsible for metrics calculation for native meter data, and adopts a stable
+   and widely used metrics system, such as Prometheus and OpenTelemetry.
+1. [Log Analysis Language](lal.md) focuses on analyzing log contents to format and label them, and extract metrics from
+   them to feed Meter Analysis Language for further analysis.
+
+SkyWalking community is willing to accept your monitoring extension powered by these languages, if the monitoring targets are
+public and general usable.
diff --git a/docs/en/concepts-and-designs/overview.md b/docs/en/concepts-and-designs/overview.md
index 568e2869a2..59ba7cee02 100644
--- a/docs/en/concepts-and-designs/overview.md
+++ b/docs/en/concepts-and-designs/overview.md
@@ -45,7 +45,7 @@ Instance and Endpoint are used everywhere today, so it is worth defining their s
 SkyWalking allows users to understand the topology relationship between Services and Endpoints, also detect API dependencies
 in the distributed environment if you use our native agents.,
 
-Besides topology map, SkyWalking provides **Service Hierarchy Relationship**, which defines the relationships of existing 
+Besides topology map, SkyWalking provides [**Service Hierarchy Relationship**](service-hierarchy.md) , which defines the relationships of existing 
 logically same services in various layers. For example, a service could be deployed in a Kubernetes cluster with Istio mesh, 
 services are detected by k8s monitoring and Istio mesh, this hierarchy relationship could connect the services in k8s layer and mesh layer.