For my iPad I turn off everything. For my
Android phone I only have Facebook & Words With Friends refresh every 4 hours. I just turned off Play Store notifications because I did know that I could do that until I read someone elses previous comment :).
My battery life is already terrible on my phone so if someone really wants to get in contact with me they can call or text me otherwise I just don’t see the benefit of notifications. I’ll check an app myself if I want an update. Notifications seem like a waste of battery life for an iPad since its just my secondary device and its only connected to wifi. I don’t want it waking itself up all the time to check for any updates/notifications.