A backup is a copy of a website that is kept on a separate server and can be restored if a problem occurs with the live Internet site - a defeated script update, an unintentional deletion of a file or of the entire database, and so on. Restoring the Internet site the way it was will remove or decrease the damage the issue may have caused, which is by all means a lot better alternative than having to rebuild your entire website from scratch. Although you can download a copy of your content on your PC, keeping a backup is a functionality that the majority of web hosting providers incorporate as part of their plans. You must check out how often they do that, though, because some companies create a backup just once every week, which can be far from enough for a booking website or an e-commerce portal where the information is updated daily. Make sure that you see how easily a backup could be restored, which could be essential if some issue appears on your site.