I think this would have to be done using VBA. There is no setting that allows
this without coding. But you could set up coding to send you an email when
the spreadsheet is saved.
You can however set up modification tracking on a worksheet. Under Tools...
Track Changes... Highlight Changes, you would select the option to track
changes while editing. Then it allows you to set specific parameters for what
you want to track. The downside to this is that you have to go out and check
the spreadsheet to see if any changes were made.