RDS MySQL is an online, out-of-the-box relational database service based on the cloud computing platform, featuring enhanced stability, reliability, safety, and elasticity. It is fully compatible with MySQL 5.7 and MySQL 8.0 and supports four instance types: single instance, primary/standby, one-primary two-standby, and read replica. It also provides database services such as backup, recovery, scale-up, and monitoring.