WhereSettingsSystemActivity log
It's chronological and it covers the whole org, not one page. Money edits, roster changes, role grants, term switches, document moves — all of it lands here.
The activity log
Every change across the app writes an entry: what changed, who did it, and when. It's the answer to "who deleted that" and, more often, the protection for whoever didn't.
Didn't find it?
Search covers the full text of every article — if it isn't there, it probably isn't written yet, and that's worth telling us.