Say you’ve posted something to a forum and then someone responds to that.
In the site you get a notification stating something like “<Person> commented on your post” displayed next to your profile pic in the top right corner of the screen. The text is a link your can click but it doesn’t always work. The example seemed to be something like, you’re in the Tri Eating site and the comment us in the Huddle. When you click the link it doesn’t do anything. Instead, your need to manually navigate to the Huddle before it works

I don’t have any notifications at the moment so, this is all from memory
I think the link text also changed depending upon which site you were in when you viewed it