Along with the primary action defined in your Campaign, you have the option to enable a Notification Button which allows you to enable a secondary action when the button is pressed. For example, you could choose ‘Rate App’ as a primary action, so that tapping the push notification would open the app, and ‘Yes / No’ as buttons that users will have the option to press within the notification itself.

Here is an example of an Android Campaign notification with and without buttons: