A backup is a copy of an Internet site that is kept on another web server and can be restored if a problem occurs with the live site - an unsuccessful script update, an unintentional deletion of some file or of the whole database, etc. Restoring the Internet site the way it was shall remove or limit the damage the issue may have caused, that's by all means a certainly better alternative than having to reconstruct your whole Internet site from scratch. Though you may download a copy of your content on your laptop or computer, keeping a backup is a feature that nearly all web hosting providers incorporate as part of their plans. You'll have to check out how often they do that, though, because some service providers generate a backup only once every 7 days, which may be far from enough for a booking website or an e-commerce portal in which the information is updated each day. It's adviseable to see how quick and simple a backup may be restored, which could be crucial if some issue appears on your Internet site.