@jfnewell1965 No problem, we can all be thick headed from time to time ;)
The :hover CSS pseudo-class matches when the user interacts with an element with a pointing device, but does not necessarily activate it. It is generally triggered when the user hovers over an element with the cursor (mouse pointer).
Simply said, hover is when you move your mouse over the link and it changes color (that's hover color). Hope that makes sense.