App won’t allow for notifications – Gmail - Email by Google Review

I matter what I do- adjust notifications on my phone, adjust notifications within the app, delete and reinstall the app, notifications do not work!! The only way I know if I have a new email is by opening the app. When I do, it refreshes and I see dozens of messages I was missing. So frustrating.
Review by SBDubya2 on Gmail - Email by Google.