What does Backup mean?
A backup is a copy of data that makes it possible to restore it after loss or damage. A functioning backup should be tested regularly to confirm that it can be restored.
AN EXAMPLE IN PRACTICE
Where you might encounter it
You back up website files and the database separately from the production server. If something is accidentally deleted, you check whether you can use the backup to restore a complete, working website.
From NetzTurm Decode. Clear explanations with historical context.