When the publisher has an associated Native Application delivered by Marfeel or not, the Lateral Menu can be configured to display an installation badge for the proper App Store.
When tapped, the app installation badge directs the user to the corresponding App store to download and install the application.
The App badge shows the latest version available, allowing users to always ensure they have the latest version installed and can also facilitate any support issue that may arise. It's also an Apple requirement for native apps available in the App store.