How do you set up Craft CMS to back up your site automatically?
Options:

1) Craft will automatically run a backup of the database anytime an update is performed and save it to craft/storage/backups

2) You can manually create a database backup by going to Settings->Tools->Create Database Backup.

3) You can install something like the Dump plugin and create a cron job that points to it to run the backup on a automated schedule.