Healthchecks
A product QR code is only as good as the page behind it. Healthchecks watch those destinations and tell you when one stops answering — before a customer standing in a shop finds out first.
The screen shows the current state, active or inactive, and Create sets a check up.
What you configure
Interval: how often the destinations are checked.
Retries and Retries interval: how many times a failing destination is tried again, and how long to wait between attempts. This is what keeps a momentary blip from becoming an alert.
Healthchecks behavior: what the check does when a destination fails.
Email address: where the report is sent.
The equivalent for standard QR codes is documented under QR codes, and the reasoning is the same in both places: the failure you want to hear about is the one nobody has noticed yet.