Restoring is taking the data that you have previously backed up, and using it to overwrite your existing data files. For example, you might need to restore if you had a problem with your computer and your data has become corrupt, or if you've made errors processing, and need to go back to an earlier period to process correctly.
Note: Restoring a backup is a complete restoration of the company data to the way it was, at the time the backup was taken. This means that any changes you've made since the backup was taken are undone.