Unfortunately or fortunately, it seems that you have an iPhone/iPad. If you really want notifications on this device, you must first click on the and add this site to your Home screen. Then, you can open it from your device's Home screen and finally click on 'Notify Me' to enable notifications. It almost seems like Apple does everything to make this process tedious. However, afterwards, you can happily receive one or maybe two notifications!
If you don't have an iOS device and you see this message, we have a problem!