Routing policy is a set of rules used by domain name system (DNS) services, such as AWS Route 53, to route traffic to an application’s endpoints. It helps control how DNS service responds to DNS queries, based on factors such as the geographic location of the user, the health of resources, or the latency of the network.
Route 53 supports several routing policies, including simple routing policy, weighted routing policy, latency-based routing policy, geolocation routing policy, failover routing policy, and multi-value answer routing policy. By applying routing policies, users can optimize the performance, availability, and cost-effectiveness of their applications by directing traffic to the most appropriate resources.