What is the difference between hovering ,and actually visiting a person's profile?
On the desktop website view, it's possible to hover over someone's name with your mouse (e.g., in the comments) and see a brief description of that person's basic information displaying without clicking and actually visiting the profile. I found the hover alerts annoying, though, and not especially useful, so I disabled them in my account settings from showing up.
I think hovering is when you mouse pointer passes over the link to someone's profile and makes a little window popup with a profile summary. Visiting is when you click on the link and actually go to the full profile. Hovering can be done unintentionally. I get those popups all the time from just moving my mouse around.