On the Advanced tab for Real Browser checks and Uptime checks there's a checkbox labeled Notify of location-specific failures:
This setting relates to the Notification settings on the Basic tab:
Whether there’s an issue with a local network on the last mile or an issue with a CDN, sometimes a site may have performance issues only from some locations.
When ‘Notify of location-specific failures’ is enabled, if the check fails only from one location, Rigor will send an alert according to the notification settings specified.
For example, say you want to be notified after 2 consecutive errors and your check runs every 10 minutes from 5 locations. If the check fails twice from any of the 5 locations in a single cycle, Rigor will send an alert notification. With this setting disabled, Rigor would only send an alert notification when the check failed twice from two unique locations.
When disabled, location-specific failure notifications will not be sent.
It's best to enable ‘Notify of location-specific failures’ if you want more proactive alerts around location-specific issues.