Following are the benefits of using RMAN:
i. Incremental backups that only copy data blocks, which have changed since the last backup.
ii. Tablespaces are not put in the backup mode; therefore, there is no extra redo log generation during online backups
iii. Detection of corrupt blocks during backups
iv. Parallelization of I/O operations
v. Automatic logging of all the backup and recovery operations
vi. Built-in reporting and listing commands.