The web app is added to the Home screen. The site will automatically ... To customize the app, open the app and go to Settings (click ⌘ , , ) and change the app’s appearance and behavior ...

Once you've done that, you'll be able to control alerts and icon badges for the web app from within the Notifications section of the Settings app. Adding Website Bookmarks to Your Home Screen For ...

Essentially, web app notifications work the same as any other notification would, appearing on your Lock Screen ... in the Notifications section of your settings, just like any other app.