diff --git a/README.md b/README.md
index 783fbeeb3a3d3982996f4b4022c157501ed11075..2d1aa94142ff813a33c5dcd2a00b5ae6307e5d1e 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@ Apache SkyWalking
-**SkyWalking**: an observability analysis platform, also an APM(application performance monitor) system, especially designed for
+**SkyWalking**: an APM(application performance monitor) system, especially designed for
microservices, cloud native and container-based (Docker, Kubernetes, Mesos) architectures.
[![GitHub stars](https://img.shields.io/github/stars/apache/incubator-skywalking.svg?style=for-the-badge&label=Stars&logo=github)](https://github.com/apache/incubator-skywalking)
@@ -16,7 +16,8 @@ microservices, cloud native and container-based (Docker, Kubernetes, Mesos) arch
[![OpenTracing-1.x Badge](https://img.shields.io/badge/OpenTracing--1.x-enabled-blue.svg)](http://opentracing.io)
# Abstract
-**SkyWalking** provides the observability and analysis platform, including monitoring, tracing, diagnosing capabilities for distributed system.
+**SkyWalking** is an open source APM system, including monitoring, tracing, diagnosing capabilities for distributed system.
+The core features are following.
- Service, service instance, endpoint metrics analysis
- Root cause analysis
@@ -27,8 +28,10 @@ microservices, cloud native and container-based (Docker, Kubernetes, Mesos) arch
- Distributed tracing and context propagation
- Alarm
+
+
# Document
- [Documents in English](docs/README.md)