Hi everyone, first time poster here

I am basically wanting to create a document which is shared by myself and my boss.
It is essentially a list of announcements which come in on a regular basis, and the current process is that I add them to the list when they come in and then let my boss know via email I have added them.
Then he looks and decides which departments they should be sent to, fills in the relevant boxes (i.e. IT department, Science, History, etc) then saves it and emails me to let me know he has done it.

Then I go back in to see which departments need the announcement, and send it to the selected departments.

I was wondering if there was a simpler way to do this (apart from having a less lazy boss obviously)

I was thinking of whether there is an email notification which comes to both of us when an amendment has been made to the document?

Or if there is some faster way of selecting who receives the announcements, that would be good too.

I would appreciate any help on this.