I'm getting these recently too as Android notifications. It's very annoying and could be very unprofessional or hard-to-explain if one came in at the wrong time.
Me too, although FWIW on Android I opened Drive, then to "Settings" under the hamburger menu, then "Notification Settings", then I unchecked the "Shared items" notifications.
That may not work for you if you want shared item notifications, but I already get bombarded by a million different notifications for everything (sometimes I hate the modern world) and I sure as hell don't want shared item notifications - if something is important enough that I should read it, the person who shared it to me will email me about it.
