What the scheduler does every day The scheduler runs the time-based work. A healthy website does not prove a healthy scheduler; the dashboard's Last Automation Run does.
Reports and insights Reports answer specific questions from your own database. Insights shows the day-to-day shape of the business.
Connect Google Analytics Google Analytics is an add-on: activate it, paste your measurement ID, and your public pages report traffic.
System health and the logs Where you find out whether the installation is well, and what happened when it was not.