When you run a site, having a backup is something really important, especially if you have important info or you have invested time and cash in developing the Internet site. There are different scenarios why you may need a backup - if you update a script and something fails, if you eliminate a file or an entire folder by accident, and so forth. 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 personal computer occasionally, but as you simply can't do that after each and every change, you need to rely on the backups which your web hosting provider generates. Because that's something really vital, you must 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 an Internet site like an online store or a holiday accommodation booking site.