What should be configured to interconnect two VPCs?

Amazon VPC Peering is a networking connection between two Amazon Virtual Private Clouds (VPCs) that enables them to communicate with each other as if they were part of the same network. VPC peering allows you to connect VPCs within the same AWS region, making it easier to transfer data and resources between them.

VPC peering is often used when you have multiple VPCs and want to allow them to communicate with each other efficiently. It's a straightforward solution for scenarios where a direct, secure connection between VPCs is sufficient. If you need to connect multiple VPCs with a more complex network architecture, you might consider AWS Transit Gateway or other networking solutions based on your specific requirements.