Source: https://uptimeify.io/resources/platform-and-support/glossary/quorum

# Quorum (Location Confirmation)

> In monitoring, a quorum is the number of check locations that must agree a service is failing before an incident is opened.

Requiring a quorum, say, 2 of 3 regions confirming the failure, filters out local network glitches and bot challenges that hit a single probe. It trades a few seconds of delay for far fewer false positives.