The notifications were first spotted by Reddit user "MrPromaster'. The "Request app" link goes to a UserVoice page where anyone can recommend that an app be added to the Windows Store.
This new method to encourage more Android apps to come to the Windows Store comes several months after Microsoft officially canceled its "Project Astoria" bridge tool plans that would have made it easier for developers to port Android apps to Windows 10.
Notification syncing between Android and Windows 10 is currently only available for those running Insider builds of 'Redstone'.
While the notifications are configurable on Android the request is rather nondiscriminatory too. For instance, we had the request feature show up for the Google Play store after it performed some app updates. Likewise for Shazam, even though there already is a Shazam for Windows 10 app available. While this tactic is not a slam dunk to get more apps to Windows 10, it is a rather clever move to reach the millions of Android users who also use a Windows PC every day.
We'll have to wait and see how well this new strategy pays off once the Windows 10 Anniversary Update rolls out later this summer to the masses.