1. Mobile Landings
A Mobile Landing is an In-App message displayed as a landing page when users open a specific push notification. Therefore you can use it to announce a more extended message such as an app review request, update reminder, etc.
Mobile Landings also help you get all your users' attention as you can detail a new feature announcement, exclusive offers, etc.
2. In-App Campaigns
In-App Campaigns are messages displayed inside your app. They allow you to communicate with your users while they are browsing the app, even if they did not turn on push notifications. You can trigger them when users open your app or as contextual reminders when they perform a specific action (e.g. tapping a button, browsing a page, etc).
You can use several formats : Fullscreen message, banner, modal or image: