Failover Routing Policy is an Amazon Route 53 routing policy that automatically redirects traffic to a backup resource when the primary resource becomes unavailable. It helps keep applications highly available.
With Failover Routing Policy, Route 53 uses health checks to monitor the primary server. If the health check fails, traffic is automatically routed to the secondary (backup) server until the primary server becomes healthy again.
In simple words, a Failover Routing Policy automatically switches users to a backup server when the main server fails, ensuring continuous application availability.