This package increases the number of database backups created daily. The standard monthly and yearly packages provide for one database backup per day. This option increases that to up to three backups per day. This is important for some sites because data can only be recovered if it is in the last backup. That means that if a backup is created at 12 PM each day and a restore is needed at 11:59 AM, a whole day of transactions will have been lost. For most sites this is not a problem but for busy sites, it can be a large problem.
The cost is for a year and requires the yearly backup plan to be active.