Introduction to the WordPress Activity Log module
The Activity Log module with all its features is designed to give you full insight into significant actions taken on your site. It will let you see exactly what has been happening on your site so you can easily look back on events and analyse what happened and what may have gone wrong.
This module is accessible from within the main navigation menu > Config > Activity Log:
How does the Activity Log work?
The Activity Log monitors your WordPress site and for certain specific actions that take place, it will record it in the database for your review, if necessary.
It also identifies the actual PHP file used to send emails (so you can track it better) and also identifies Post types when posts are updated.
And use the Activity Log Viewer to review your activity logs.
To learn more about the Shield's Activity Log, read the blog article here.