At one point they used to have a little notification at the top-right, on your profile pic, to tell you that you had a reply, or whatever.
I'm honestly not sure where that went.
These days I mainly just monitor my steemd page to see if I've received comments, upvotes, etc.
busy.org might have a better notification system - I haven't checked it out yet, to be honest. Mostly I'm trying to avoid using apps that sit on top of the blockchain, other than steemit, because they tend to take a chunk of your author reward.
The last sentence makes a lot of sense! I asked around in the Steemit Chat yesterday and some folks pointed me to https://steemit.com/@ginabot. You probably are aware of it and it does indeed maybe sit on top, but thought I'd share it for what it's worth.👍
Followed by the way!
Excited for the entrepreneurial, business and marketing content on Steemit! 👍