The Health Report compiles key metrics and actionable insights from :doc:` Blackfire Monitoring </monitoring-cookbooks/index>` and Blackfire Builds.
To benefit from all of the Health Report features, we strongly recommend to activate at least, on a given environment:
The Health Report generates an overview of your application’s performance over 7 days. It compares it with the previous 7 days period.
Therefore, to generate a thorough Health Report, Blackfire Builds and Monitoring should run on a given environment for a period of at least 14 days.
Some advanced metrics are compiled over 6 weeks of data collection.
A summary of the Health Report is sent every Monday, from 9.00am according to the time zone configured in your environment settings.
You can change your subscription settings for the Health Report separately from other email notifications via your personal settings <https://blackfire.io/my/settings/notifications>.