If you manage an Internet site, having a backup is something very important, particularly if you have important info or you have invested time and money in building the site. There are various situations why you could need a backup - if you update a script and something goes completely wrong, if you erase a file or an entire folder unintentionally, and so on. Having regular backups will help you avoid any loss of information or at least minimize the damage, which is still better than losing the entire site. You could download a copy of your content on your laptop or computer occasionally, but since you simply can't do that after each change, you must rely on the backups that your hosting provider generates. Because this is something extremely necessary, you have to ensure that they keep up-to-date backups, given that a backup executed once every one or two weeks might not do any good if you run a site like an online store or a holiday accommodation reservations site.