Umbraco Health Check
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When you are managing a complex CMS instance, this is a really clever way to provide an super user / administrator a quick overview of which issues they potentially are facing, along with suggestions on how they can be fixed.
The Umbraco Health check is fully pluggable by developers, so add-ons can also extend with their own health checks and it’s a good sanity check when you are troubleshooting a system.