AURORA 
Amazon Aurora is a MySQL-compatible relational database engine the speed and availability of high-end commercial databases with the simplicity and cost-effectiveness of open source databases.
Provides five times the throughput of standard MySQL running on the same hardware.
one tenth of the cost
no license constraints
Scale read operation using read replicas that a low 10ms replication latency.
Security
Network Isolation - using VPC
Encryption at rest using keys you create and control through AWS Key Management Service
Encryption of data using SSL
On an encrypted Aurora instance, data in the underlying storage is encrypted as are the automated backups, snapshots, and replicas in the same cluster.
Fully compatible MySQL 5.6 using InnoDB storage engine.
Replacing Commercial DB solutions like Oracle or SQL Server
There are differences in schema designs and data types of Aurora.
Can be migrated but it has to be managed carefully.
Migration Process
Use AWS Database Migration Service
AWS Schema Conversion Tool
Availability
99% of the time
Fault-tolerant
Self-healing
Six copies of data is replicated across three Availability Zones.
Continuously backed up to Amazon S3