Update description.
diff --git a/data/docs.yml b/data/docs.yml
index 59785c4..3b3aacc 100644
--- a/data/docs.yml
+++ b/data/docs.yml
@@ -3,7 +3,7 @@
   list:
     - name: SkyWalking
       icon: S
-      description: SkyWalking is an Observability Analysis Platform and Application Performance Management system.
+      description: The documentation including core concepts, protocols, Java agent, OAP backend, and UI
       user: apache
       repo: skywalking
       docs: