Database - Network
Here you will be able to configure your Database Networking settings.
Publicly Accessible: Tick it if you want EC2 instances and devices outside of the VPC hosting the DB instance to connect to the DB instance. If you no tick it, Amazon RDS will not assign a public IP address to the DB instance, and no EC2 instance or devices outside of the VPC will be able to connect. If you tick it, you must also select one or more VPC security groups that specify which EC2 instances and devices can connect to the DB instance.
Availability Zone: The EC2 Availability Zone that the DB Instance will be created in.