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How do you receive notification ?

he also posts on twitter and you can turn on notifications on your phone

But not all post , this post not there yet and evx was posted after 20 mins . How can we get notiification on Steem ?

I don't think if its possible or not.. I think you should keep checking haejin's profile often in order to get the latest posts fast.

I have him on twitter and I got text updates. I also subscribe on youtube so I get all his video posts :)
And a lot of times im reading his old posts when he posts a new one. So I see his posts right away and im on steemit alot :)