Via WPBeginner Editorial Staff | @wpbeginner
You should always install and setup a WordPress backup system for your site. This allows you to restore your site should something go wrong.
Many users lose access to their WordPress admin area after a hack attempt or some plugin error. In these cases, most tutorials recommend that you create a complete WordPress backup.
However, since you cannot access the admin area, it would be hard for you to use a plugin for backups. This is where knowing how to make a WordPress database backup manually comes in handy.
A manual database backup is exactly the same as the database backups created by a plugin.