Restructure content and change naming

Author: Fabrizio Mirabito

content/arduino-cloud/01.getting-started/04.api-overview/api-overview.md

@@ -1,57 +1,52 @@
 ---
 title: Arduino IoT Cloud APIs
-description: A summary of the different sets of APIs available for the Arduino IoT Cloud
+description: Arduino IoT Cloud has two different set of APIs. Read below to learn more
 author: Karl Söderby, Fabrizio Mirabito
 tags: [IoT Cloud, API, JavaScript]
 ---
-
 The [Arduino IoT Cloud](https://create.arduino.cc/iot/) has different sets of APIs that provide different functionalities. This article serves as an introduction to how to work and what you can achieve with them.
 
-## What you can achieve
-Arduino IoT Cloud API allows you to build a large range of IoT solutions: from simple device data communication to building complex custom IoT solutions. Some examples are:
+## Configuration API
+### What you can achieve
+The main goal of Configuration API is to allow you to create and manage IoT resources like dashboards, devices, things, and variables, along with the retrieval and handling of historical data coming from your IoT Devices. The core of those APIs is organized around  [REST](http://en.wikipedia.org/wiki/Representational_State_Transfer). Our API has predictable resource-oriented URLs, accepts  [form-encoded](https://en.wikipedia.org/wiki/POST_(HTTP)#Use_for_submitting_web_forms)  request bodies, returns  [JSON-encoded](http://www.json.org/) responses, and uses standard HTTP response codes, authentication, and verbs. You can use those APIs, both directly calling our HTTP endpoints or using our clients that wrap those calls into easy-to-use abstractions like objects and functions. We have Applications API clients available in `javascript`, `golang`, and `python`.
 
-- Connect your Arduino or 3rd party Devices to the Cloud to monitor and control them, leveraging easy-to-use dashboards in minutes
-- Build your Gateways that poll data from local devices (ex.BLE, Zigbee) and send it to the Cloud
-- Develop your custom web or mobile application that leverages Arduino IoT Cloud infrastructure to handle device connectivity without worrying about protocols, security, data formats, scaling servers...
-- Automate and integrate different IoT Solutions with a single, powerful Cloud 
+To use the Configuration API, you need to create an **API Key** in the [API Keys](https://cloud.arduino.cc/home/api-keys) section.
 
-## Two Different Sets of API
+**Examples**
 
-There are two different API types to consider when working with the Arduino IoT Cloud: 
+- Build an automated script to create your things, in bulk
+- Duplicate the configuration of things, dashboards, devices
+- Create your own personal web application to manage your resources
+- Build a script that reads your variables' data and provides custom analytics 
 
-**1. Applications API** - a set of powerful and flexible APIs that allows you to create and manage IoT resources like dashboards, devices, things, and variables, along with the retrieval and handling of historical data coming from your IoT Devices. The core of those APIs is organized around  [REST](http://en.wikipedia.org/wiki/Representational_State_Transfer). Our API has predictable resource-oriented URLs, accepts  [form-encoded](https://en.wikipedia.org/wiki/POST_(HTTP)#Use_for_submitting_web_forms)  request bodies, returns  [JSON-encoded](http://www.json.org/) responses, and uses standard HTTP response codes, authentication, and verbs. You can use those APIs, both directly calling our HTTP endpoints or using our clients that wrap those calls into easy-to-use abstractions like objects and functions. We have Applications API clients available in `javascript`, `golang`, and `python`.
+You can find the full list of available resources and actions in the [Arduino IoT Cloud Configuration API Technical Reference](https://www.arduino.cc/reference/en/iot/api/).
 
-**2. Monitor and Control API** - a set of libraries that allow sending and receiving any kind of data (sensors' values, commands for actuators, configuration changes...) from and to IoT Devices and the Cloud. Under the hood, they
+## Data API
+Data API allows sending and receiving any kind of data (sensors' values, commands for actuators, configuration changes...) from and to IoT Devices and the Cloud. Under the hood, they
 
 - take care of the data exchange with our MQTT broker
 - handle best in class authentication & security 
 - manage compression, data format, and transport protocols
 
+### What you can achieve
+- Send sensors' values to the cloud
+- Send and receive input and commands from and to dashboards
+- Listen for variables' values changes and act upon them
+
 Inside this set of API, we have:
 
 - An official Arduino IoT Cloud Library for your Arduino sketches: `ArduinoIoTCloud.h` 
 - An NPM Javascript package: `arduino-iot-js`  
 
-
-## Applications API
-To use the Applications API, you need to create an **API Key** in the [API Keys](https://cloud.arduino.cc/home/api-keys) section.
-
-For more examples and detailed instructions, visit the links below:
-- [Applications API Technical Reference](https://www.arduino.cc/reference/en/iot/api/) - the complete REST API documentation with hundreds of examples.
-
-- [Arduino IoT Cloud Applications API Guide](/arduino-cloud/getting-started/arduino-iot-api) - a guide to using the API with JavaScript, Python & Golang.
-
-## Monitor and Control API
-
-### Arduino IoT Cloud Sketch library
+**Arduino IoT Cloud Sketch library**
 As described above, is the Arduino library that allows your Arduino devices to connect and exchange data with the IoT Cloud. If you edit your sketch directly inside IoT Cloud or Cloud Editor, you don't need to install it: it comes out of the box.
 
 You can find more details at:
 
 - The [official repository](https://github.com/arduino-libraries/ArduinoIoTCloud)
 - The [cheat sheet](https://docs.arduino.cc/arduino-cloud/getting-started/technical-reference)
 
-### Arduino IoT JS
+**Arduino IoT JS**
 The `arduino-iot-js` NPM module is designed for communicating with the Arduino IoT Cloud broker using the MQTT over Websocket protocol. It is primarily used to send and receive variable values.
 
 Example:
@@ -73,7 +68,6 @@ Full examples and documentation can be found at:
 - The [official repository](https://github.com/arduino/arduino-iot-js)
 - The [NPM module](https://www.npmjs.com/package/arduino-iot-js) page  
 
-
 ## Backward Compatibility Policy
 
 Public Arduino IoT Cloud APIs are exposing versioned endpoints and are committed to preserving compatibility with the following policies in place: