Merge pull request #22 from HubSpot/readme-update

docs: update readme with SDK overview

README.md

@@ -1,5 +1,20 @@
 [![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.hubspot.mobilechatsdk/mobile-chat-sdk-android/badge.svg)](https://maven-badges.herokuapp.com/maven-central/com.hubspot.mobilechatsdk/mobile-chat-sdk-android)
 
+## Overview
+
+HubSpot's Android Mobile Chat SDK is designed to seamlessly integrate HubSpot Chat into any Android mobile application (see [here](https://github.hubspot.com/mobile-chat-sdk-ios/) for the iOS documentation). With this SDK, developers can effortlessly provide their users with a fast, efficient, and empathetic in-app customer support experience.
+
+### Key Features
+
+* Integrate HubSpot Chat into your mobile app to deliver real-time, in-app customer support.
+* Leverage HubSpot's powerful Bots and Knowledge Base to deflect customer inquiries 24/7.
+* Alert users of new messages via push notifications.
+* Customize the chat experience to align with your brand and user interface.
+
+### Private Beta Launch
+
+We are excited to announce that the Mobile Chat SDK will soon launch to private beta. If you're interested in being among the first to experience its capabilities and provide valuable feedback, we invite you to apply for the private beta program using [this form](https://forms.gle/nk3SHDATUP4pBUqi9).
+
 ## Introduction
 
 This is app is intended to demonstrate the HubspotSDK and Push Capabilities to the demo application.