I'm of two minds about push notifications. On the one hand, they're probably the best lever for growth. On the other hand, the constant drive for engagement is one of the main things that makes social media toxic. Daily/weekly digests might be a good way to thread the needle. 

 I'm sure they're great but I always turn them off :-)

(except maybe for DM from a contact) 

 Cool feature but I turn off all push notifications except call and text. I hate getting bombarded  with notifications. 

 focus filters!