If you run a website, having a backup is something extremely necessary, specifically if you have important data or you have invested cash and time in building the Internet site. There are various scenarios why you may need a backup - if you update a script and something goes completely wrong, if you erase a file or a whole folder by accident, 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 desktop or notebook every now and then, but because you simply can't do that after each and every change, you will need to rely on the backups which your web hosting provider generates. Since that is something extremely important, you have to make certain that they keep up-to-date backups, given that a backup performed once every one or two weeks won't do any good if you run a site like an online store or a holiday accommodation booking site.