I've taken to "Archiving" apps like this on my Android phone. When I need it, I can un-archive it to use it. Keeps the list of things trying to get my attention a little bit smaller.
Also all notifications/etc are silent, except for alarms, pages, phone calls, and specific named people's texts.
Everything else... no. YouTube was the worst offender before for me.
Uber. Hands down. I'm using it a lot less since they started sending ads on the same notification channel as my ride updates.
The main exception to this is the notification spam from Google asking me to rate call quality after every damn call. I don't have my phone rooted, so I can't turn off that category of notification.