Common use cases for using an Intent include:

1. To start an activity: You can start a new instance of an Activity by passing an Intent to startActivity() method.

2. To start a service: You can start a service to perform a one-time operation (such as download a file) by                  passing an Intent to startService().

3. To deliver a broadcast: You can deliver a broadcast to other apps by passing an Intent to sendBroadcast(),           sendOrderedBroadcast(), or sendStickyBroadcast().