5. Using Backup
Your WordPress database contains every post, every comment and every link you have on your blog. If your database gets erased or corrupted, you stand to lose everything you have written. There are many reasons why this could happen, and not all are things you can control. With a proper backup of your WordPress database and files, you can quickly restore things back to normal.
Backing Up Your Database
It is strongly recommended that you backup your database at regular intervals and before an upgrade.
Restoring your database from backup is then possible if something goes wrong.