HR/HM do you know when your employee is looking to make a move?

I mean ... not really? But when you start adding people on LI, the LI algorithms are more likely to suggest you as possible connections to people it thinks you’re connected with. That may give your manager some extra information, if they’re smart, that you have a recently updated profile and have some new connections.

Well, usually yes. There are plenty of signs that are hard to miss if you're not ignorant