Add list of use cases

Author: nibble-4bits

README.md

@@ -25,6 +25,7 @@ This package lets you run AWS Step Functions state machines completely locally,
 ## Table of contents
 
 - [Features](#features)
+- [Use cases](#use-cases)
 - [Installation](#installation)
 - [Importing](#importing)
   - [Node.js](#nodejs)
@@ -50,6 +51,16 @@ This package lets you run AWS Step Functions state machines completely locally,
 
 To see the list of features defined in the specification that have full support, partial support, or no support, refer to [this document](/docs/feature-support.md).
 
+## Use cases
+
+Why would you want to use this package? Below is a non-exhaustive list of use cases for `aws-local-stepfunctions`:
+
+- Testing state machines changes locally before deploying them to AWS.
+- Testing the integration between a state machine and the Lambda functions associated with it in `Task` states.
+- Debugging the code of associated Lambda functions interactively using the [`Task` state resource override feature](/docs/feature-support.md#task-state-resource-override).
+- Debugging a state machine by using the [event logs feature](/docs/feature-support.md#execution-event-logs), to better understand the transitions between states and how data flows between them.
+- Running state machines in the browser (not possible with [AWS Step Functions Local](https://docs.aws.amazon.com/step-functions/latest/dg/sfn-local.html)).
+
 ## Installation
 
 ```sh