Add feature list to readme file

README.md

@@ -1,10 +1,13 @@
 # AWS IoT Device SDK for Java v2
 
-This document provides information about the AWS IoT device SDK for Java V2. This SDK is built on the [AWS Common Runtime](https://docs.aws.amazon.com/sdkref/latest/guide/common-runtime.html)
+The **AWS IoT Device SDK for Java v2** enables you to connect IoT devices to AWS IoT Core, publish messages to topics,
+subscribe to topics, and use various AWS IoT services such as Device Shadow, Jobs, and fleet provisioning.
 
 *__Jump To:__*
 
-* [Installation](#installation)
+* [Using SDK](#using-sdk)
+* [Features](#features)
+* [Building from source](#building-from-source)
 * [Android](./documents/ANDROID.md)
 * [Samples](samples)
 * [Mac-Only TLS Behavior](#mac-only-tls-behavior)
@@ -14,7 +17,7 @@ This document provides information about the AWS IoT device SDK for Java V2. Thi
 * [MQTT5 User Guide](./documents/MQTT5_Userguide.md)
 * [Migration Guide from the AWS IoT SDK for Java v1](./documents/MIGRATION_GUIDE.md)
 
-## Installation
+## Using SDK
 
 ### Minimum Requirements
 
@@ -24,13 +27,6 @@ This document provides information about the AWS IoT device SDK for Java V2. Thi
 
 [Step-by-step instructions](./documents/PREREQUISITES.md)
 
-### Requirements to build the AWS CRT locally
-* C++ 11 or higher
-   * Clang 3.9+ or GCC 4.4+ or MSVC 2015+
-* CMake 3.1+
-
-[Step-by-step instructions](./documents/PREREQUISITES.md)
-
 ### Consuming IoT Device SDK from Maven in your application
 
 Consuming this SDK via Maven is the preferred method of consuming it and using it within your application. To consume the Java V2 SDK in your application, add the following to your `pom.xml` dependencies:
@@ -46,10 +42,37 @@ Consuming this SDK via Maven is the preferred method of consuming it and using i
 Replace `1.25.0` in `<version>1.25.0</version>` with the latest release version for the SDK.
 Look up the latest SDK version here: https://github.com/aws/aws-iot-device-sdk-java-v2/releases
 
-### Build IoT Device SDK from source
+## Features
+
+The primary purpose of the **AWS IoT Device SDK for Java v2** is to simplify the process of connecting devices to AWS IoT
+Core and interacting with AWS IoT services on various platforms. The SDK provides:
+
+* Secure device connections to AWS IoT Core using MQTT protocol (MQTT 3.1.1 and MQTT 5.0)
+* Support for [multiple authentication methods and connection types](./documents/MQTT5_Userguide.md#how-to-setup-mqtt5-builder-based-on-desired-connection-method)
+* [Android support](./documents/ANDROID.md)
+* First-class support for AWS IoT Core services.
+
+#### Supported AWS IoT Core services
+
+* The [AWS IoT Device Shadow](https://docs.aws.amazon.com/iot/latest/developerguide/iot-device-shadows.html) service adds
+shadows to AWS IoT thing objects.
+* The [AWS IoT Jobs](https://docs.aws.amazon.com/iot/latest/developerguide/iot-jobs.html) allows to define a set of remote
+operations that can be sent to and run on one or more devices connected to AWS IoT.
+* The [AWS IoT fleet provisioning](https://docs.aws.amazon.com/iot/latest/developerguide/provision-wo-cert.html) can
+generate and securely deliver device certificates and private keys to IoT devices when they connect to AWS IoT for the
+first time.
+
+## Building from source
+
+Requirements to build the AWS CRT locally
+* C++ 11 or higher
+  * Clang 3.9+ or GCC 4.4+ or MSVC 2015+
+* CMake 3.1+
 
 [Install Maven and Set PATH](https://maven.apache.org/install.html)
 
+See [step-by-step instructions](./documents/PREREQUISITES.md) for more details on configuring required tools.
+
 ``` sh
 # Create a workspace directory to hold all the SDK files
 mkdir sdk-workspace