A backup is a copy of an Internet site that's kept on a different hosting server and could be restored if something wrong happens with the live site - a failed script update, an unintentional deletion of some file or of your whole database, etcetera. Restoring the site the way it was shall eradicate or reduce the damage the issue may have caused, which is by all means an obviously better option than having to rebuild your whole Internet site from scratch. Although you may download a copy of your content on your laptop or computer, keeping a backup is a function that nearly all hosting companies offer as part of their plans. It's important to check out how often they do that, though, because some service providers create a backup just once every couple of days, which can be far from enough for a booking website or an e-commerce portal in which the information is updated each day. You should also see how quick and easy a backup may be restored, which can be vital if some issue appears on your website.