In the upper right corner, by clicking on Account, select the Changelog option from the drop-down menu.
Within this option, you can see all the changes that you or your users have made within the system as well as many filters to find changes faster.

You can click on each item from the list to see more details and old values before the change took action so you can monitor all logs easily.

There is also an option to UNDO CHANGE so the values are reverted to old ones.