Changes take ~10s to appear here. If in doubt, reload the page again after a short wait.
ok means the alert is not triggered at the moment.pending is an alert that is being triggered, but has not reached the wait time to fire yet.firing is a firing alert. Notifications will be sent out for that one.Webhook is using an HTTP POST request with a payload described here.
This is informational only, it lists all services that are being monitored. Alerts will only be sent out if they are configured above.
The component called "node" is the monitoring for the host system (CPU/RAM, etc).