A VPC peering connection is a networking connection between two VPCs that enables you to route traffic between them using private IP ADDRESSES. And INSTANCES which are in VPC can COMMUNICATE with each other as if they are within the same NETWORK.
You can create a VPC peering connection between your own VPCs, or with a VPC in another AWS account within a single region.
If you have more than one AWS account within a same region and wants to share or transfer the data, you can peer the VPCs across those ACCOUNTS to create a file sharing network. You can also use a VPC peering connection to allow other VPCs to access resources you have in one of your VPCs.
A VPC peering connection can help you to facilitate the transfer of data.