Local notifications allow your app to notify the user about content which does not require the use of a server.
Unlike remote notifications which are triggered from a server, local notifications are scheduled and triggered within an app. Notifications in general are targeted to increase user interaction with the app, inviting or tempting the user to open and interact with it.
UILocalNotification was deprecated in iOS 10. Use the UserNotifications framework instead.
Do not confuse UILocalNotification with push notifications. UILocalNotification is triggered by your device, and when scheduled, is copied to the system.